Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b6e112b420190fd…

MALICIOUS

PDF

72.7 KB Created: 2021-09-07 20:01:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 1b0e8ab7145e887c780164d804b63c76 SHA-1: 1ae84f18c4f1e76f836d2ba4b4230a83130d893a SHA-256: 1b6e112b420190fd0b730a3c181c0ce83c76dec4783dc5d7a5140fb3186a3e77
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a link farm or phishing lure. The PDF structure and embedded URLs are indicative of a phishing campaign or a distribution point for further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 https://soudurelauziere.com/upload/editor/file/limedasinifetirozosuj.pdf In PDF document text
    • http://stroisvias.ru/userfiles/file/32190434682.pdfIn PDF document text
    • https://metnar.pl/web/uploads/files/57481397380.pdfIn PDF document text
    • http://analogsys.com/uploaded/file/4948975160f6b7f59eb2a.pdfIn PDF document text
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/65b182a9f81f54c319cca313073492be/lasuvitetidomen.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/3f0eea6c9e699c10a230414cae57ae4b/somafir.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/6evq1sbuli4kphn4d3t6424vi2/fulabufuzifelepororinuku.pdfIn PDF document text
    • https://mimpishio2bet.com/contents//files/87243188144.pdfIn PDF document text
    • http://www.propper-droppers.nl/files/file/talufoziwagajonemira.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1d04e22573---18647305054.pdfIn PDF document text
    • http://ownlines.com/upfiles/file/54046460739.pdfIn PDF document text
    • https://sportsht.com/userfiles/file/mexedolurazu.pdfIn PDF document text
    • http://vietnam-intraco.com/webroot/img/files/lufomugitapunurorer.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/dad063839ffe552b96aabd1a96a8dd19/viwolilanulejeburerenixeb.pdfIn PDF document text
    • https://asi-filter.pl/files/file/midexawotuferutape.pdfIn PDF document text
    • http://geometracosentino.com/userfiles/files/winoxoxowamuvalov.pdfIn PDF document text
    • http://yenidenyuzlendirme.com/ckfinder/userfiles/files/2128341238.pdfIn PDF document text
    • https://dotcomtravelegypt.com/userfiles/files/zawitaboxozame.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/d234e6e31b93873bb9fb09cca7384b74/vetebipavisovozubiniwukib.pdfIn PDF document text
    • https://faprosid.com/file/93097867079.pdfIn PDF document text
    • http://bscartridge.com/pic/samuj.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/aanp5bk4h6p78k5du77nr3gom9/kipepepexifevifu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=pneumothorax+pdf+filePDF 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_off0000bb37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB37 16264 bytes
SHA-256: f818b2968f300d72178d8732ca4f9dcc6314377c32e922f7bdcf2488d64cbb81
font_01_sfnt_off0000e4ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4CA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fce1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE1 10800 bytes
SHA-256: 087294ac079cae1a4cb8054903ac9f62f59bc37bd9b92b1083a8e380d1532090

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