Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b866ba02022f9a5…

MALICIOUS

PDF

87.8 KB Created: 2021-08-11 02:02:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 395f13e46a285aa609014526d4dcfa64 SHA-1: fae0b4ea7427d59914b97801e917b43e677127b9 SHA-256: 2b866ba02022f9a5def00bc5b912afc2d4b69b8a071160c596d469dcba49fde1
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous URLs pointing to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm to distribute further malicious content or phish users. The PDF structure and embedded links are consistent with a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://synerhu.ru/uplcv?utm_term=evaluation+cm2+cod+coi+cc PDF link annotation
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4a3bb97b5e---35796600785.pdfIn PDF document text
    • http://thingsantiquesla.com/userfiles/files/miwetiwureri.pdfIn PDF document text
    • http://iccarrentals.com/files/file/jagaxa.pdfIn PDF document text
    • https://proektasis.gr/admin/spaw2/uploads/files/63347664332.pdfIn PDF document text
    • http://keysrotary.com/clients/d/da/da683cbc30bfd632b0b364d14bdd38fd/File/73702446133.pdfIn PDF document text
    • http://lpkgoodframeupvc.com/userfiles/files/74508656041.pdfIn PDF document text
    • https://777mto.com/contents//files/60861943585.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607020b46b900---60111931630.pdfIn PDF document text
    • http://geoman.cz/data/file/balevov.pdfIn PDF document text
    • http://stillwaterponies83.com/clients/74660/File/74010810274.pdfIn PDF document text
    • http://kaies.cn/upfiles/210526161503310688lv62lx.pdfIn PDF document text
    • http://bpsstudio.hu/uploads/15965982314.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/9l6hgvk6kv2d2qnvu4pd0tm6s4/wonegubakupopubezuf.pdfIn PDF document text
    • https://www.ijdsir.com/ckfinder/userfiles/files/94287042064.pdfIn PDF document text
    • https://zlatartopalovic.rs//files/98413603021.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/poxun.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16090ab904e6ff---xawenivaj.pdfIn PDF document text
    • http://bestorkate.com/uploads/ckeditor/files/37511932773.pdfIn PDF document text
    • https://solidpractise.com/files/userfiles/file/nakinodixodefozojaful.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/cc67432593182074a6577b1f097f8cf6/4401975577.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607dad926c9a6---vufatinelanoworofexagev.pdfIn PDF document text
    • https://chetanaus.org/bheru/uploadfiles/file/11067658131.pdfIn PDF document text
    • 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF71 19436 bytes
SHA-256: 87e67960675905458fdeee0ff59b2aafe85f808e7e73be2e1e0f39670f972774
font_01_sfnt_off00011fa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FA8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000137bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137BF 10400 bytes
SHA-256: cfeb2af70f499fb05fd5de4890fd29a92c9f396ce52f67e6a9aee69743061d43

Open this report in the interactive analyzer, or submit your own file for analysis.