Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0a84ff9be87b555…

MALICIOUS

PDF

72.3 KB Created: 2020-12-15 03:30:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 546d9be80a37021cf0230fd624115ea0 SHA-1: 9081e49fba9181fc24c43f1fa40b41d54c579138 SHA-256: f0a84ff9be87b555b1b58a5893312c6c9cfeae4d4f320cfec77d4abeea0568eb
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://traffine.ru/strik?utm_term=growing+up+gotti+10+years+later PDF link annotation
    • https://pijezokonogoxa.weebly.com/uploads/1/3/4/3/134308979/fiwomoketuneboli.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/5fbce344be7cfc36344e8aaf/t/5fbd01dfedabee7b4408093c/1606222312740/34297653175.pdfIn PDF document text
    • https://s3.amazonaws.com/sowirutelevolur/5722210535.pdfIn PDF document text
    • https://s3.amazonaws.com/somisilegex/algebra_1_review_quiz_3_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7dad389-42d3-4c7a-82bd-4034c0677d91/walebazikadazozupeji.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/vukovuzubetalufesep.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f33f2cf09257bd6c4f7e/t/5fc20d7208845d0924d1b026/1606552947164/583474147.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf651a61e25426e130bfbf/1606378780359/55423834760.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc78f6b9ea50d4120a246cf/t/5fcc6611920f47545b8ae964/1607230995281/crazy_russian_hacker_dogs.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc69e96bdb33045eee9cc09/t/5fca0ee952b5874c85972bcf/1607077610514/pottery_barn_christmas_stockings.pdfIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/husky_brute_hb4500_instruction_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5d5c5cd-72cb-4470-bc62-0caf84028caa/communications_high_school_new_jersey.pdfIn PDF document text
    • https://s3.amazonaws.com/xubifupi/exercise_for_ankylosing_spondylitis.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3486312facd59cebc5192/t/5fc47bf5e6d49a06bb2250df/1606712314159/sample_meet_and_confer_letter_re_discovery.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc58a00bdb33045eee1a39e/t/5fcaf52733fb14715cb28131/1607136552617/outbreak_meaning_in_english_urdu.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_off0000ccfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCFE 5288 bytes
SHA-256: acc9ca8537a4e1815026e7961890953c31848f812771842d3d56f31b01b4d97c
font_01_sfnt_off0000df2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF2C 10832 bytes
SHA-256: 77cd39b68b1febc2eccebfbd3fd14be8adaab5d0f8e1c7ca4b4bdabde1204b2f
font_02_sfnt_off00010407.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10407 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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