Malicious PDF — malware analysis report

Static analysis result for SHA-256 901d951f7dc97d43…

MALICIOUS

PDF

81.0 KB Created: 2020-11-23 05:19:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 096f95b3009a7dc74928d79e68b50bfc SHA-1: e78066bebcb1df56852a9a7a06e5feb78b7a0d82 SHA-256: 901d951f7dc97d4355854bb9febf82c6fe13f72b927b0731fe34f94a0419a46e
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying it as a "PDF_SEO_LINK_FARM". The document body, though heavily obfuscated, contains text related to "7sage lsat gpa calculator", suggesting a lure. The primary malicious URLs identified are trafffi.ru and sepikupi.weebly.com, indicating a potential phishing or spamming operation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://trafffi.ru/123?utm_term=7sage+lsat+gpa+calculator PDF link annotation
    • https://sepikupi.weebly.com/uploads/1/3/0/7/130738949/4399179.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405641/normal_5f9a2e555d321.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389805/normal_5fb7b1799260f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387035/normal_5f90f8a68ad51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420238/normal_5fab9266007e7.pdfIn PDF document text
    • https://jozitosada.weebly.com/uploads/1/3/4/3/134325699/mudile-kugixuretaj-sibidi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367273/normal_5f9a2daa8f5d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378852/normal_5f8dc53215391.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/dad320c2-3205-4868-9a10-96438dabde99/70200771569.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a8c5d9a-ae62-4be3-929a-bb1396a18835/clarinet_articulation_exercises.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bf7579c-a3a2-4b0a-a283-8b55d4d5ac44/john_cena_vs_rey_mysterio_raw.pdfIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/kabujotigozufidunazoji.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/34776172292.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b7b911b-37da-4f9d-a7f0-bd2a004b77be/73667071288.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85364d90-57fa-4802-b3cb-c7d9b31cb6e3/my_hero_academia_ep_16_in_their_own.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
    • 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_off0000eaf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF0 5084 bytes
SHA-256: 3352d29efbf59828a8680d9121669c1069593bda07063be9711c9b903d9142f3
font_01_sfnt_off0000fc52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC52 10996 bytes
SHA-256: b3f25b7aeeeaa70a28fae4deff5fe7c6fff1b0a5bfe7bae4ca1d115c24e6bd40
font_02_sfnt_off000121ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121EF 16208 bytes
SHA-256: fe139538347d724e6b27dab22ead91fbb1eb3470a850438049392072e7f85921

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