Malicious PDF — malware analysis report

Static analysis result for SHA-256 af24c32194f98ef9…

MALICIOUS

PDF

73.0 KB Created: 2021-03-04 08:15:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: e06bddd7445175d9beede1302f39f9b4 SHA-1: b15413c354597341fb54a8615ca1cee7d832d642 SHA-256: af24c32194f98ef97e0bdf184b183536345bb64a85e79b90658814943ec2263a
156 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 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 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.
  • 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://jottigo.ru/wix?keyword=components+of+an+ecosystem+worksheet PDF link annotation
    • https://cdn.sqhk.co/fowurona/IhbThhz/batman_the_telltale_series_shadows_gameplay.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402533/normal_5ff1217b16a09.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366043/normal_601d2732f1294.pdfIn PDF document text
    • https://cdn.sqhk.co/busibelifiv/jcjccne/lucky_life_8_dolls.pdfIn PDF document text
    • https://cdn.sqhk.co/gixekoji/uichahb/2_player_games_battle_tanks.pdfIn PDF document text
    • https://cdn.sqhk.co/zesonixiv/icZfjea/clockwork_orange_costume_amazon.pdfIn PDF document text
    • https://renobikedasel.weebly.com/uploads/1/3/4/8/134897329/toxinenagoren-sufewu.pdfIn PDF document text
    • https://cdn.sqhk.co/vixawutozama/ihCXChh/lifagizapib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417139/normal_600bcaa244641.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/dewazewokib/how_do_i_send_my_life_certificate_online.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/1066253240.pdfIn PDF document text
    • https://s3.amazonaws.com/kavifunaruvi/bts_love_yourself_answer_heart.pdfIn PDF document text
    • https://s3.amazonaws.com/nilititonawafim/60161839694.pdfIn PDF document text
    • https://s3.amazonaws.com/wozoxub/tetaxisaze.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 4

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_off0000e2ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2CA 5388 bytes
SHA-256: 79ba37f3afb82eb96aa2d07364ab4b3dba17ae4764d30dbcf976856554538959
font_01_sfnt_off0000f507.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF507 9848 bytes
SHA-256: 99bf918da0611f3585e596c4be9a33df578a365aa2d5cfabdb32988b64309e25

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