Malicious PDF — malware analysis report

Static analysis result for SHA-256 873c0bd4b528ad46…

MALICIOUS

PDF

131.6 KB Created: 2021-03-16 06:53:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 3815bf84785a8407f7e5ae14cda37190 SHA-1: b501358343b321811a293cfd3e7b548ea0ec6727 SHA-256: 873c0bd4b528ad46fa85f1f9f206bb1785b0008896d785aaa6192c7828c2a3f3
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection, indicating malicious intent. The presence of numerous external URIs, many on disposable hosting, suggests a link farm designed to redirect users to malicious sites. The heuristic 'SE_URGENCY_LURE' indicates the document likely uses deceptive language to prompt user interaction, aligning with phishing or malware delivery tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://kuzutuzo.ru/wix?keyword=cheat+achievement+cookie+clicker PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4392193/normal_601d9eff4508e.pdfIn PDF document text
    • http://floradoma.net/nevanelelatuza89pzx.pdfIn PDF document text
    • http://folejaf.mypressonline.com/wokodosufal.pdfIn PDF document text
    • http://dfds.in/39598452160a2vkp.pdfIn PDF document text
    • http://itchia.space/591552671244um9m.pdfIn PDF document text
    • https://fabuxitewuf.weebly.com/uploads/1/3/4/3/134349615/famarupekodojoj_kodamokokoj_gudojoz_jepanomumefuju.pdfIn PDF document text
    • http://verification-help.business/446703216519tioc.pdfIn PDF document text
    • https://zekenegelu.weebly.com/uploads/1/3/4/3/134390475/a19623e89af827.pdfIn PDF document text
    • https://noruwapawufibem.weebly.com/uploads/1/3/0/9/130969999/ruxonet-bebofaxafowefa.pdfIn PDF document text
    • http://teenagetutor.net/44495965705mwjpv.pdfIn PDF document text
    • https://wifevotus.weebly.com/uploads/1/3/4/8/134897576/79dfa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450345/normal_603c03c5bf41b.pdfIn PDF document text
    • https://gerugufudob.weebly.com/uploads/1/3/4/8/134869234/2453377.pdfIn PDF document text
    • http://leporabev.mywebcommunity.org/how_to_make_a_soccer_training_program.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/savukojubusum/lovilemavuvuzujumosededal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a1fe9bc-80ba-4a81-bbc8-c3c0a310259d/vimotinimegujilijatij.pdfIn PDF document text
    • http://kikanelomer.onlinewebshop.net/gulosuvazoxuvivulodifaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb80a859-f47a-4f2c-9734-ba2bd7ad8134/31358001044.pdfIn PDF document text
    • https://s3.amazonaws.com/muwomapotumugi/dazobitu.pdfIn PDF document text
    • https://s3.amazonaws.com/dapekufoxiraku/detinijetetolezizo.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_off0001bdfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BDFB 4888 bytes
SHA-256: 62209b34eb03191765ea2d1b243f826204eda81fd7ca5998cfb2a520829ed69a
font_01_sfnt_off0001ce73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CE73 15208 bytes
SHA-256: eec39dea45be822c0b8e38f8e6ea7c5cdc02aa6a14cb26634ab47e7bab72c3c2

Open this report in the interactive analyzer, or submit your own file for analysis.