Malicious PDF — malware analysis report

Static analysis result for SHA-256 486c123fd6b35d0c…

MALICIOUS

PDF

73.0 KB Created: 2020-12-05 21:50:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: c028f04f64369540b102044381d5f035 SHA-1: 90fadd595c8a3a18045e39c4a1b1d4d06be8bcca SHA-256: 486c123fd6b35d0cddd53081a80b5f908e2b5e15b707a441d9c34c6940403dc5
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffe.ru/strik?utm_term=wireless+ps2+controller+not+working PDF link annotation
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/44d87feaf8ee.pdfIn PDF document text
    • https://kaxogirigajel.weebly.com/uploads/1/3/4/6/134611066/9a4d656a.pdfIn PDF document text
    • https://nuvisinuxaxo.weebly.com/uploads/1/3/1/3/131383681/zafume-danitej-torixus.pdfIn PDF document text
    • https://faworufobideped.weebly.com/uploads/1/3/2/6/132682851/01bdd5cc.pdfIn PDF document text
    • https://rugurujumififez.weebly.com/uploads/1/3/1/3/131384765/lalenijenufuvefama.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc29ae41c8c7413143cd114/t/5fcbe2ad1415195da092b4e6/1607197358703/57040291765.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee2be666-951c-422c-8079-4ba58d64f9dc/how_to_make_grey_concrete_minecraft.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e607df132613bbbdbdb8/t/5fc2bc1aeaf37e3b64f6a860/1606597658651/mitologa_griega_dioses.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4c64d91-064e-458b-b835-b0f47ddf0ce2/70436164807.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe2b30145a8629dc7aa9f8/1606298419134/beach_coffee_table_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/532a6acf-b8a6-4781-8ee8-8608ec467d52/duzinukof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/176cc116-ce7c-486c-ad68-3c6cb08a95d9/henrico_county_math_modules.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc50b922e537a05ef23ad8d/t/5fcb2e20b6b7366152f49c8a/1607151137266/download_game_fruit_splash_mania_mod_apk_offline.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80608483-e03f-4eec-a98f-3766dcd737ee/74280224634.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_off0000ca03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA03 5192 bytes
SHA-256: 46d5dd09f5065f24612ecc63106384c677288484b2ac298eb94914f31a1f4174
font_01_sfnt_off0000dbe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBE6 10976 bytes
SHA-256: 0912e80104728759751b21d8b057adfc5abbae8b2af8f9c16062a57bdb6b0e30
font_02_sfnt_off0001015b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1015B 16260 bytes
SHA-256: d25a34a56be33791b66bd7dbe91ee772b39b89bee75ba0e64ef3ea6cb2c10b57

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