Malicious PDF — malware analysis report

Static analysis result for SHA-256 da7e1f2e29cce749…

MALICIOUS

PDF

74.4 KB Created: 2021-03-25 10:37:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 682d752a7495c7f414e28afe933bfa7f SHA-1: e8f2da9d616c676dd27e56195928e4f3dff19a1b SHA-256: da7e1f2e29cce74940fbbf14feb79463711f595fd2474f9c37c55f22814f9aba
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one specifically targeting a search query for a "SAP MM configuration guide PDF free download". The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, suggesting a link farm or phishing attempt. ClamAV detection and ML classification confirm the malicious nature of the PDF, likely used as a lure for phishing or to distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xajibur.ru/wix?keyword=sap+mm+configuration+guide+pdf+free+download
    • https://cdn-cms.f-static.net/uploads/4416326/normal_603cbbe2845ff.pdf
    • http://radanews.site/lilulenedomezamugadepidez2jtat.pdf
    • https://static.s123-cdn-static.com/uploads/4486778/normal_6001cbe88e48a.pdf
    • https://subafeso.weebly.com/uploads/1/3/3/9/133986831/tixap.pdf
    • https://kilizilefepik.weebly.com/uploads/1/3/0/7/130775254/kekulonok-dijosat-pesanepukodifew.pdf
    • https://pufizemopuvagup.weebly.com/uploads/1/3/1/4/131407511/191421.pdf
    • https://cdn-cms.f-static.net/uploads/4489050/normal_604181259936f.pdf
    • http://mon-cmso.best/detroit_slang_what_up_doeguy8a.pdf
    • https://miwolugakibu.weebly.com/uploads/1/3/1/3/131383652/luwebovuf.pdf
    • https://kofudisefases.weebly.com/uploads/1/3/4/0/134018526/dolux.pdf
    • https://vabisoxapulaji.weebly.com/uploads/1/3/4/4/134444495/ravomefib-zuleforaf-wapadosawuzabin-jojexiwakobamo.pdf
    • http://sarkife.site/gojenajukunuvasapefeto58bn.pdf
    • http://baranaydin.org/zifebetoxuzatubagitugarkarzg.pdf
    • https://vudelugofede.weebly.com/uploads/1/3/4/3/134383428/sekibo-natekivef-bisen-didebu.pdf
    • https://xatikofaf.weebly.com/uploads/1/3/0/8/130814669/5e745717b8.pdf
    • https://static.s123-cdn-static.com/uploads/4492593/normal_5fe4b57d8a588.pdf
    • https://depasosuva.weebly.com/uploads/1/3/4/4/134483816/3921274.pdf
    • https://zajevikafe.weebly.com/uploads/1/3/5/2/135297545/vukuzused.pdf
    • http://fitdieta.com/descargar_musica_gratis_mp3_para_celular_facilg8hw1.pdf
    • https://jitivafume.weebly.com/uploads/1/3/0/9/130969372/d53d9e0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/liwara/zirevi.pdf
    • https://s3.amazonaws.com/wufujudisu/bhojpuri_movie_nagin.pdf
    • https://s3.amazonaws.com/sajatofubote/85598065971.pdf
    • https://s3.amazonaws.com/livivuvuwugeb/authorizing_your_agent_form.pdf
    • https://s3.amazonaws.com/patilawasu/average_salary_of_bank_compliance_officer.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1fa.bin
05c10ef41953881dd995024918d6ecf13cdde5f3a7de254411146947e74f461a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE1FA 5492 bytes
font_01_sfnt_off0000f4a5.bin
018de503c19687fbcc677c21be82c99a655ed4fc19961014d0563d2e26cb8873		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A5 11004 bytes

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