Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a2ab382480823e4…

MALICIOUS

PDF

94.5 KB Created: 2021-07-02 19:57:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 182e7b14a8b953ea898c0cb318a0f874 SHA-1: b6deb56a5bd1ef73c66455dac10433252a47c7ae SHA-256: 1a2ab382480823e4894ff57b88d1519aeca6b5d4fbab61d59f49447042d16fe7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm hosted on multiple compromised websites, suggesting an attempt to distribute malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the presence of numerous links to PDF files on compromised CMS upload directories points towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ea7242d6c7---41557732180.pdf In PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607a14ecc06db---vunaditujitosowugetota.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160df2e7b1be70---fumuzatinonogumakipaz.pdfIn PDF document text
    • http://highlandcougars83.com/clients/2/26/268573c5102cd00412bac87cee9346ec/File/59739753614.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/fh4g19b3h73are790fl1qjsp3g/letiz.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bf2498cdd56---4051025443.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/b21632546c8ebf65fa87faee5e1ab144/54467705172.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/16076f6679c277---28809548265.pdfIn PDF document text
    • https://readandenjoy.ae/userfiles/files/nuvibibonugokizovovamidek.pdfIn PDF document text
    • https://betenenergy.com/sites/default/files/file/15416749664.pdfIn PDF document text
    • https://ventadeterrenosurbanos.com/userfiles/file/duvojal.pdfIn PDF document text
    • http://onlinecommerce.bg/uploads/pages/files/majabepoxogo.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609fe4e0ecf81---66620322610.pdfIn PDF document text
    • http://alliusie.com/userfiles/file/lovowuvumakizakanapanam.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/8a7fd3b728ed44ed0c66ea1f97c1c48c/jajawivebimazodolagiberek.pdfIn PDF document text
    • http://aromamahabaleshwar.com/ckfinder/userfiles/files/koxufidotalo.pdfIn PDF document text
    • https://mosconi.net/userfiles/file/merigediwupipokifogo.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/aef21775ee38eb0ca548bda812df5e73/watixiburale.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/2357ed39e80f31c93099bd3bbd58b72b/53052719440.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b76c3956f60---87304156478.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609d9d7e50898---74163608297.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/1607a1debab91f---1527361239.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/31f322da01ed34517de61fd13e7060cc/66648711398.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/160808aa49b746---lusipabexelam.pdfIn PDF document text
    • http://anhuizpyy.com/upload_fck/file/2021-5-21/20210521023641102296.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4da6327511---83033393398.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1606f917ace99e---gesidil.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=frequency+of+short+wave+diathermyPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011056.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11056 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012868.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12868 16360 bytes
SHA-256: 564d5870c9b62c052d821a40c858ffc284e8dd601d6c9b436812e8f71e7e162e
font_02_sfnt_off00015288.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15288 11184 bytes
SHA-256: 023d1aa2afadb4703998aaf6c308944b7aa7f6abdb9d674998963b1e4cbc62fd

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