Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fac2857c063769e…

MALICIOUS

PDF

67.2 KB Created: 2020-12-25 06:08:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: ba8e98d0fc8f32b9f7f2fb96c0fa62c7 SHA-1: e51d099b2f63f9f62b3d79fcbfe9a8814116e514 SHA-256: 3fac2857c063769e08521003214684e8230f1e75c1499ffdec20658b72bf0a36
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that likely serves as a lure for users to download further malicious content. The document body, though heavily obfuscated, suggests a deceptive purpose related to a song or download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafficel.ru/aws?utm_term=chavanprash+song++likewap PDF link annotation
    • https://cdn.sqhk.co/ludibipimilu/giDojcR/tikef.pdfIn PDF document text
    • https://cdn.sqhk.co/kafekata/DdNF9jd/pocket_gm_20_football_tips.pdfIn PDF document text
    • https://cdn.sqhk.co/letowajaf/ghhcRz2/botisajiwi.pdfIn PDF document text
    • https://cdn.sqhk.co/sepunaro/ePyhzjf/kivudusinirinul.pdfIn PDF document text
    • https://cdn.sqhk.co/zoboxoba/jdicxtR/g-_stomper_studio_demo_app.pdfIn PDF document text
    • https://cdn.sqhk.co/fojupigek/jwdhcWL/68665790726.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459162/normal_5fc1e5b4bb4be.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/busutafitufe/53520283871.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87dd59bc-5547-457c-9a4d-6a5d7a2c3842/ribimedovakizepabon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12c034cc-7742-4a44-8a15-67937bba9906/101_povesti_vindecatoare_pentru_adul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5fb3fe4-e991-4c3d-b5bc-520260bb0cbd/driverack_pa2_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3649be6f-ad25-4a61-9898-7d6853f9a30c/polopozarizewefagumew.pdfIn PDF document text
    • https://s3.amazonaws.com/xajowu/64121413934.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/531139fa-470c-4df8-9e14-abf07553af63/tadubepovefe.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/48428374631.pdfIn PDF document text
    • https://s3.amazonaws.com/luropi/chemical_energy_and_atp_study_guide.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_off0000cc1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC1A 5200 bytes
SHA-256: bebe64107a3ca2d0dbaec38f2a450e78bb3379be926c61a34709588f7981004f
font_01_sfnt_off0000ddd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDD7 10096 bytes
SHA-256: a0a6d0ea32d927cc4f11bd60943a9ebc7b8eaef1a6b0645cffd0457cad5fd3a3

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