Malicious PDF — malware analysis report

Static analysis result for SHA-256 085dff2500fd0b72…

MALICIOUS

PDF

76.3 KB Created: 2020-12-16 18:39:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 98bc0d20d84b2d10cb418f949ba2732a SHA-1: d88da1534420152a2640c69ed9fde22c92efdb63 SHA-256: 085dff2500fd0b72189edeca563853bbc5a39f9c39c058a1b1dd13d561ee621e
214 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 and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/123?utm_term=things+fall+apart+chapter+summary+pdf In PDF document text
    • https://wagofokixe.weebly.com/uploads/1/3/4/6/134694124/ragupel-mirugik-gozitujemi-lululoji.pdfIn PDF document text
    • https://vasinurevesodux.weebly.com/uploads/1/3/4/6/134605286/801d1704.pdfIn PDF document text
    • https://murufafutebe.weebly.com/uploads/1/3/4/4/134473477/luwokafabisawuxig.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/5fbd1b31b24ece27e9146c9b/1606228785821/38732524246.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf50c364571256543155b3/1606373571678/description_of_a_tree_stump.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcfd15ef3361272aec3c9c/1606221078930/37028733208.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61431aaa-15b0-4095-81a9-a19d9dc111f0/sayenko_y_suprunyuck_vdeos_cristian.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/858aa099-091f-4ab4-8cec-9d39511b4ea6/bojekawovogajof.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe1a6a3570fb44d1cba083/1606294134921/xunofujijolizoga.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe227008845d0924536256/1606296177173/52299771559.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17a9eda6-8fa3-4003-92fa-fbeef5706742/cascade_1500_canister_filter_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da5a43cb-3809-46b0-a026-082ed19e4de3/venosijomajax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31f4ce8f-a460-4b8e-81dd-c8409f377abb/30766004580.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf3c01af5bf52c326897d/1606218689126/91056475797.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_off0000e1da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1DA 5392 bytes
SHA-256: 32725f3099ff8c8795427b37e42f7d332d9a34d170299a6ad824f39a0eb681c1
font_01_sfnt_off0000f400.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF400 9880 bytes
SHA-256: 9e2ec8fb3e88f091961e0bc69f087b8ad14fe97c63682c8b069a689968f724cb
font_02_sfnt_off00011599.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11599 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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