Malicious PDF — malware analysis report

Static analysis result for SHA-256 abfa0902560dadc6…

MALICIOUS

PDF

73.7 KB Created: 2021-02-21 07:22:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: f12fdfb771734c1d56e35306dab5eab3 SHA-1: 56f484498b4131e5d8e922862e3d94a1078ad7d9 SHA-256: abfa0902560dadc6ef3d6391d80fa9f0b8e674a6cd0ce67cc2b1ce91d51edaec
126 Risk Score

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 0.9998

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://bologen.ru/123?utm_term=sketchbook+express+pro+apk+free+download PDF link annotation
    • https://fatibetoliwan.weebly.com/uploads/1/3/4/7/134731660/xuvugug-lifikigasepafo-muxuxu-susupeb.pdfIn PDF document text
    • https://cdn.sqhk.co/zimuteraf/npjbgcy/50998437114.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467593/normal_60267a1c9aef6.pdfIn PDF document text
    • http://wuvozikeximufuk.iblogger.org/song_ballay_ballay_coke_studio.pdfIn PDF document text
    • https://cdn.sqhk.co/xugosovemi/ijcdW44/nawinapepamabepopesarege.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412160/normal_600ca23b7e02a.pdfIn PDF document text
    • https://cdn.sqhk.co/zifuvifiweva/urjhjgJ/download_best_voice_assistant_for_android.pdfIn PDF document text
    • http://fovagenifozemub.iblogger.org/31478364007.pdfIn PDF document text
    • https://cdn.sqhk.co/riragimi/huhaiaT/call_of_duty_warzone_download_size_2020.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/nefunupu/zemewizumidaxodifezogexo.pdfIn PDF document text
    • http://jilutuve.rf.gd/doubles_plus_one_worksheets_second_grade.pdfIn PDF document text
    • http://bipunasozusi.epizy.com/cayenne_2019_manual.pdfIn PDF document text
    • http://xumupeg.rf.gd/behavioral_finance_textbook.pdfIn PDF document text
    • https://s3.amazonaws.com/likerajatob/forrest_gump_main_theme_piano_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/dugidedonidubi.pdfIn PDF document text
    • https://s3.amazonaws.com/xeruxaxer/ios_12._1._2_iphone_6_plus.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_off0000e396.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE396 5708 bytes
SHA-256: b984112896710e415898b276a3437be077b5d08b20c35b04309f6050c907bd13
font_01_sfnt_off0000f716.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF716 10184 bytes
SHA-256: 338e4c5c024331e30539fd13adc67b4a80091a16e23d045f2c98279b4e7703ac