Malicious PDF — malware analysis report

Static analysis result for SHA-256 f70e8d0536b9ae3e…

MALICIOUS

PDF

83.8 KB Created: 2020-11-18 15:11:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 36b9cff335809dad3a414b90536dbb18 SHA-1: c649575bc841d9a9d461395f92c9ae0d88304154 SHA-256: f70e8d0536b9ae3ec7b7f86a92420e2c7ce973a92fbfc417147f774da2df7619
176 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM'. The presence of an embedded URI pointing to 'trafftec.ru' further supports the idea of directing users to external sites. While the document body is heavily obfuscated, the overall structure and heuristic firings suggest a phishing or malicious redirection attempt, possibly related to SEO spam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://trafftec.ru/wb?keyword=android%20game%20mode%20message PDF link annotation
    • https://wazajodowefode.weebly.com/uploads/1/3/4/0/134017502/kekulurulorixab.pdfIn PDF document text
    • https://xikosenazegan.weebly.com/uploads/1/3/0/7/130739601/3511007.pdfIn PDF document text
    • https://bugadubotureje.weebly.com/uploads/1/3/4/4/134468403/9262876.pdfIn PDF document text
    • https://tumixivig.weebly.com/uploads/1/3/1/6/131636813/moruzubobiv-batupatupifab-bajav.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mejawiwomak/camel_cigarettes_price_per_pack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71ebd8a3-b96b-4f49-a094-3f8da2f3fcd6/80797759571.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5276ad9-eaf3-4277-8daf-dcadb347e69e/sepasil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76f333e6-6e24-4475-96c5-ab89dbcf8084/nuwajufaraxox.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/33800601250.pdfIn PDF document text
    • https://s3.amazonaws.com/xefejevife/bandicam_pro_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/liberalization_policy.pdfIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/action_and_linking_verbs_quiz.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010b95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B95 5104 bytes
SHA-256: e7388c86348326fe9fb2747a4b28084fe469ded71f1a44b760e8f67e4deaa0a0
font_01_sfnt_off00011cd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CD9 11220 bytes
SHA-256: 1bdaa3d0a823de4fbd872b41b254fda109437e9553c2474fed1f5540c4933a6a

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