Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5197f9a76147567…

MALICIOUS

PDF

72.0 KB Created: 2021-04-04 23:19:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 726f7b720ecd443b395518526c1ff57a SHA-1: 9e23c8ec32feafeb399fbc9accf894babedac46d SHA-256: c5197f9a7614756749fb0abbb58d9ad0f59485f9015785a23a32fe2ba874d5ff
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9993

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
  • 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/123?utm_term=buganda+royal+institute+fees+structure+pdf PDF link annotation
    • https://cdn.sqhk.co/wirowanorax/4hedjfc/cosmos_db_pricing.pdfIn PDF document text
    • http://bogplaktnc.fun/696549533uvhka.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427268/normal_6017402b628db.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393761/normal_5fc9115e4449f.pdfIn PDF document text
    • http://tehnopolis.org/sonny_and_cher_songs_crossword_cluev9vci.pdfIn PDF document text
    • http://creampiepow.club/7647071146w6f03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451210/normal_6067baa9a36df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477369/normal_606106d15b1a9.pdfIn PDF document text
    • https://cdn.sqhk.co/gejupajo/cLgcuxX/bumobiwip.pdfIn PDF document text
    • http://devlp.club/43595828617zk5nq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495390/normal_5fedd14f87797.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxatotukaru/oZnAVB3/brother_synonym_informal.pdfIn PDF document text
    • https://cdn.sqhk.co/wadusazilox/hdhjiew/android_video_calling_app_source_code_github.pdfIn PDF document text
    • https://cdn.sqhk.co/xorilulog/ehiw8ha/16998196306.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372373/normal_5ffe7fd8ebd27.pdfIn PDF document text
    • http://fullpisetc.ru/fanepuxorowebamiberekudeedzxo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393353/normal_60010ae59149a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bidemewufa/worifipopujowefitimo.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/laser_welding_stainless_steel_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4701c2a0-b268-4639-bf4c-702e920d8d31/92676657876.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/717b46d5-baf3-42eb-b5f4-047814bc5b1a/barbie_doll_house_design_games.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b079949-4480-40a2-babf-7f79b92a180c/tablas_de_multiplicar_para_imprimir_para_colorear.pdfIn PDF document text
    • https://s3.amazonaws.com/wavunot/risadu.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_off0000dad0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD0 5476 bytes
SHA-256: b0d0c2857895f62e460286f984e528c30eeb0aea8d52d8c3dd7bb00cf5e0dcfd
font_01_sfnt_off0000ed8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED8E 10828 bytes
SHA-256: 1691e0b5cc69492def09850a792e808853346149988b1b1561a3599ec1199443

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