Malicious PDF — malware analysis report

Static analysis result for SHA-256 c883622722da6b2f…

MALICIOUS

PDF

76.6 KB Created: 2021-03-17 15:23:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 60a31d64257835d98f6d0f5deded87a2 SHA-1: 55af447b52a15e15bf4eecba8f353547d367737e SHA-256: c883622722da6b2f64b33a99fc3da9e5c76adae461203b0dabf4df4361522991
186 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 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://botokaw.ru/award?keyword=mathematics+probability+and+statistics.+pdf PDF link annotation
    • http://taxutipepavij.iblogger.org/disomonovenesagezi.pdfIn PDF document text
    • http://figufesivinex.22web.org/aps_calendar_2021-22.pdfIn PDF document text
    • https://pilituxasi.weebly.com/uploads/1/3/4/6/134685590/95daa2b7a4dae9d.pdfIn PDF document text
    • https://totijavefukaja.weebly.com/uploads/1/3/4/7/134705726/foxelozu-vubuxat-malad.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/73545f40-3c29-43a6-a373-046b51491f41/bavisivoxig.pdfIn PDF document text
    • https://s3.amazonaws.com/meludav/96745251254.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5df6ae4f-4c23-4bb8-928e-ae1f5c86f7e6/vefik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35d222da-3e38-4c5b-8493-203b76784072/78057125240.pdfIn PDF document text
    • https://s3.amazonaws.com/gapuruxumeg/how_to_fix_an_rca_tablet_that_wont_turn_on.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71635c3f-b5d1-4144-82bc-28b0153f4fab/valerie_winslow_classic_human_anatomy.pdfIn PDF document text
    • http://vejaxuka.epizy.com/rajipamojasutotaku.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/all_pokemon_games_cheats.pdfIn PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/gokimekajetopef.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/25012509556.pdfIn PDF document text
    • http://xetobagog.rf.gd/1619947580.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15c270b8-e9c0-4c78-b6bd-de77dd210e6b/bijozen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/343a99e4-0635-47b1-9631-c9f9f9efb77c/11780863737.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/043c8e77-7f8c-4e85-9892-239510a0be9c/what_is_the_symbol_for_sp_500_options.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3239a49-771c-480c-8faa-915e7f98ec95/filowapetimodajowofe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bde6c516-7566-4a1b-b655-cd87129fe0a6/35218788362.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB9E 5672 bytes
SHA-256: d0ad0c9c4e2ef9358f1ea55da9ae06e769217a941c63a291078219a1b6dad003
font_01_sfnt_off0000fed3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFED3 11136 bytes
SHA-256: fc85dec7c0b5855ef25be20b32195ab3caa4da533fb0da5dfe17a6a415eb1ec8

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