Malicious PDF — malware analysis report

Static analysis result for SHA-256 11895b40a10fe681…

MALICIOUS

PDF

73.6 KB Created: 2020-12-07 04:12:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 7c7d7ad30447f4cdaa047aa25f1d23a3 SHA-1: 95f1553c1f0c3a8c12f359f163e05872240bbd9d SHA-256: 11895b40a10fe6812837ed1d701bc8c07807c47651fc1bed58fa764ebf8bc6b2
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://traffine.ru/123?utm_term=what+is+author%2527s+purpose PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4380545/normal_5fa814f126e7c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485310/normal_5fc81336805bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379859/normal_5f8b19e24f317.pdfIn PDF document text
    • https://wezawitulenif.weebly.com/uploads/1/3/4/3/134338426/pejikurep_beduran_gizuvama_jowefomukabov.pdfIn PDF document text
    • https://disanelazutiwi.weebly.com/uploads/1/3/4/3/134361230/7999329.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370087/normal_5f89d54aeb857.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://static1.squarespace.com/static/5fc0e99a0a2757459be2ef6a/t/5fc3cefce6d49a06bb06ee20/1606668030081/coins_for_pixel_gun_3d.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6cb9efc603311fbf61aa6/t/5fc7e44421434e22734c3d01/1606935624755/call_of_mini_dino_hunter_hack_apk_2019.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc585359698b02c7f3ffd29/t/5fcc6460c836a917f903fd2e/1607230563418/bee_brilliant_blast_mod_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf25ab3c-675a-45e4-b6f5-5ce2c0605efd/63966464851.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8589ca7a-3ead-414c-97a9-18de64bda430/27600052417.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/emotion_wheel_worksheet.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc57982a879396864270a01/t/5fc8c3aaec83506b0481f7ed/1606992811183/munokosuwijonu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1160e1b-bdf6-494b-a1b6-a58512c8ec2c/bewuvitisakezo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdc80dca-6f4b-4e75-b001-e5c62a3a1f1e/36372240069.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe09359ee0f32b871ac5ac/1606289718448/stair_climbing_and_power_physics_lab.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7FF 4700 bytes
SHA-256: eeda1ace4d5899d0bd757c45eacbf148ce861584f64457965b81d804a07ef481
font_01_sfnt_off0000e81f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE81F 10116 bytes
SHA-256: cb99b2dfef9282f6a3f88b7a71c67bccd7aca3abcfc5c12620b190886d6d088f
font_02_sfnt_off00010ac3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AC3 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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