Malicious PDF — malware analysis report

Static analysis result for SHA-256 27c687f9b929e252…

MALICIOUS

PDF

84.2 KB Created: 2021-09-07 18:46:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 01524fbf959fc2bf2dcc54c925cb811c SHA-1: c967cce7a2bdde8f64b34af173d299f216074899 SHA-256: 27c687f9b929e252ed6333fbfa88f3e45505a5456a8121669d20f0cfdb72d01c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a link farm pointing to various domains, some of which are hosted on compromised CMS uploads, suggesting a phishing or malware distribution scheme. The presence of external URIs and a 'download button' heuristic further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://hainescentreasia.com/images/file/31060274869.pdf In PDF document text
    • https://a2designbg.com/userfiles/file/numokijosuvokename.pdfIn PDF document text
    • http://sherwoodchambergolf.org/ckfinder/userfiles/files/zatoreresid.pdfIn PDF document text
    • http://jaatkinson.com/userimages/tipokuwolekedugun.pdfIn PDF document text
    • http://narnivet.com/userfiles/files/74164745016.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/34ce0454fcc1e0a0619b917b4fa8bbb6/44640932353.pdfIn PDF document text
    • https://esperanzadeavila.com/fotos/file/mudofodu.pdfIn PDF document text
    • http://antifftech.com/uploadfile/file///2021071915531853.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608a179020541---56132773467.pdfIn PDF document text
    • http://grandp.ru/userfiles/file/roraxonewufusulinu.pdfIn PDF document text
    • https://kodcomputers.ro/2664/uploads/6665856898.pdfIn PDF document text
    • http://holidayinntorino.com/userfiles/files/44950862897.pdfIn PDF document text
    • https://dom4m.lv/userfiles/files/gulatoz.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161060dd7aeac4---wopebajeraxevolexin.pdfIn PDF document text
    • http://www.binghan.my/userfiles/file/jilidapemezologidomi.pdfIn PDF document text
    • https://landtop.com/filespath/files/20210901231049.pdfIn PDF document text
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd2e7a5567---nerusirazumufefu.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c78b24801c5388de311b145d25769ef2/bimolizonufasotole.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e3caacf453---midenifafudes.pdfIn PDF document text
    • https://handientu.vn/userfiles/file/dutarevoluzajupo.pdfIn PDF document text
    • https://x-software.cz/data/file/29147744547.pdfIn PDF document text
    • http://kadh.kr/bobod/upload/file/32939743495.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=practical+chemistry+class+11+pdf+downloadPDF 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_off0000e2d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D6 11136 bytes
SHA-256: 165789c510165861d1d6984a9e6205839090e5ee142bed93e1a1868db6f88e73
font_01_sfnt_off0000fcc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000114d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114D4 17784 bytes
SHA-256: 471b704cc341425b621e406ded4055514023d780873f4a0a9bcfe2d18b8650ec

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