Malicious PDF — malware analysis report

Static analysis result for SHA-256 aabb718cbe8a3065…

MALICIOUS

PDF

118.3 KB Created: 2021-06-07 13:29:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 901a364b08ee1ebd26925c8034c18ccf SHA-1: be0e0f1a79c166e347e8cd603f77ac95cbd6f9e4 SHA-256: aabb718cbe8a30659cb70395389bfaaefae487f94bb28a2c3692b902878c386f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan distribution attempt. It contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, appears to be a lure related to a search query, further supporting a phishing or social engineering attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://queure.ru/uplcv?utm_term=does+costco+sell+greenies PDF link annotation
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eca560a8ee---19943882465.pdfIn PDF document text
    • https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/d52b10eafb5d4113dc7916fd9836a9e1/pojositujijolezelilituze.pdfIn PDF document text
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16092d806eae41---40254053716.pdfIn PDF document text
    • http://goddesshair.net/upload/users/files/zokizaluvibidifekedi.pdfIn PDF document text
    • http://www.aadhar-interior.com/userfiles/file/sunuvetes.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b202908f0ff---movagevefujebewoji.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/0h9k3qmuc2bjtrsjsv6tj4i8ro/dadorozasosire.pdfIn PDF document text
    • https://kermiradiatoriai.lt/images/files/89477755246.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/1k6sg1dj1o8l0fb9b1mo0v0quj/7036802043.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/15ff227dde0a65150f7493496735e94d/27388603013.pdfIn PDF document text
    • http://barcabianca.eu/upload/file/zapofefewewuv.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/71f3e82d9a39a841fdf56214a8bf3f8c/94332177116.pdfIn PDF document text
    • https://hagepoorter.be/files/files/nixugejokigojonojovuvuzus.pdfIn PDF document text
    • http://jyjwqj.com/uploadfile/file/%5C/2021060112023795.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b894770497b---10119122652.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160929bf8bf6bc---nawuvuwugevitapemotanapuw.pdfIn PDF document text
    • http://allasclub.com/campannas/file/56133364075.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001924b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1924B 4756 bytes
SHA-256: 9483b337afb2955fe1a2ceff21b16a41357a2228e4a7448e79f9824649556c48
font_01_sfnt_off0001a292.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A292 12392 bytes
SHA-256: b65f94c21331876e69731525bf35f90ce2817020046cd3579f8424cc72c1f793