Malicious PDF — malware analysis report

Static analysis result for SHA-256 980b198dc5c502b4…

MALICIOUS

PDF

46.5 KB Created: 2020-11-06 09:49:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 1cf980e64eb6e0bf830a5cffd0e5e2bd SHA-1: 284b2c3f02221e4105bd9dfa8a409e14dccf58c8 SHA-256: 980b198dc5c502b450817688cba2c513a9e700f2e044c1921e35eadb3ee3bda6
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by 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 1.0000

Heuristics 4

  • 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://cctraff.ru/strik?keyword=sunset+mortgage+company+lp In PDF document text
    • https://musimisipamorek.weebly.com/uploads/1/3/4/5/134594646/8630482.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369630/normal_5f8b72e591912.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412394/normal_5f9c1229bf853.pdfIn PDF document text
    • https://mejefarekobuk.weebly.com/uploads/1/3/4/3/134338461/gaxozijeja.pdfIn PDF document text
    • https://pevugubak.weebly.com/uploads/1/3/2/7/132740457/jowebanar.pdfIn PDF document text
    • https://veborejekeraleb.weebly.com/uploads/1/3/4/4/134480613/6274723.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://uploads.strikinglycdn.com/files/ebe9cb16-ac3e-4d23-abe9-ac69421c6403/juruferepigezovawukabetid.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/architectural_drafting_lettering_styles.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/economy_in_the_georgia_colony.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42a21f48-bd02-4c50-aeec-a5ab13b4bc01/51352567768.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/10858183296.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4af7e569-45fe-45dd-aa23-c765f562eb41/my_hero_academia_season_2_episode_20_english_dubbed.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/jonegujes.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/wolf_furniture_outlet_store_altoona_pa.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_off00006898.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6898 5292 bytes
SHA-256: 3164676741fba678653af8ba801dcc84380d528aeb1ab093c6ea6bbff7b0384a
font_01_sfnt_off00007a78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A78 10848 bytes
SHA-256: 25a331e0ac30c2f973005364703ca30edb430a1a873250d82f5d170ef4b0aa92
font_02_sfnt_off00009f72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F72 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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