Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0d840077c28c7f4…

MALICIOUS

PDF

68.8 KB Created: 2020-12-19 10:41:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 5a4268089000045cf6af51bf5f71f36f SHA-1: b5fb2c7a2b5768306500207c5b44a40db9845d75 SHA-256: f0d840077c28c7f4a1104fe35f0b6aa0e234b0a8e38bdd6659a4394b7f0558bb
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://traffset.ru/123?utm_term=spotify+premium+android+apk+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365586/normal_5f9535384143b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454179/normal_5fbb76dda0df1.pdfIn PDF document text
    • https://sutikarojujo.weebly.com/uploads/1/3/4/3/134343437/0ae7779358f80d.pdfIn PDF document text
    • https://nawajago.weebly.com/uploads/1/3/4/6/134621860/delebetowigojowexa.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/b7946a93-08a4-49fc-a767-74576d78517f/jack_of_all_trades_master_of_none_essay.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdc9ff03a83d042422c3343/t/5fdd1959d8383479490f8ba3/1608325465984/shirley_infant_school_ofsted_report.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc77f6f579eee3ae06e1abd/t/5fd6bf17ffab5d3c56089894/1607909143522/20886388542.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79728fbe-4d7b-4eda-8e13-5eaf07b9ee43/14928699820.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf55f25147b148042a279f/1606374901242/is_an_eagle_a_tertiary_consumer.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7af4058762305c0fa1f2b/t/5fd617cf7fc52c20691b3a5b/1607866319502/live_football_streaming_apk_windows.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87ff7a08-2b38-46e3-b43f-b9c9e7a902da/16141911602.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8b3f43d-8aec-48a6-ab85-45fb449e73bc/young_again_cat_food_canada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efa89be2-a6d1-4d2f-b7d8-1bff6600dea5/60585427187.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9416134a-9c99-4dd6-80c3-16c26779bcb2/hidden_city_game_cheats_rubies.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5a206bda9c57a97de70c0/t/5fd05e13a9460057587c5d5e/1607491092010/nazofifawojuzajoxasozimol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1001d929-7ce9-483b-a837-f039671dd36c/93408796031.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_off0000cfcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFCF 5248 bytes
SHA-256: e1d7e6a83c0719d5630f4cfceccc7eacfcd0ed18a73722fecf49cdec18f45641
font_01_sfnt_off0000e19e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE19E 10792 bytes
SHA-256: 9bda665de6bbffe429c7b5ec8f6e51647228634bef5aff9e5d2656bb42e90aa4

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