Malicious PDF — malware analysis report

Static analysis result for SHA-256 05510c945d507dd4…

MALICIOUS

PDF

97.2 KB Created: 2021-03-15 14:21:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be7e6e19d1b9331b668abca9d4256383 SHA-1: 72fb20166daf6420cd8cf8b1f1d1055b46dbb99e SHA-256: 05510c945d507dd4b94be7cdcc017ba0654d1c6ba33aa703e0efa04a236d99ce
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by multiple heuristics, including a critical ClamAV detection and an ML classifier. The heuristics indicate it functions as an advance-fee scam, likely luring victims with promises of prizes or parcels. The file contains a mass external link farm, with one prominent URL pointing to a potential landing page for the scam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://maypoin.ru/wix?keyword=molecular+cloning+a+laboratory+manual+%2528fourth+edition%2529+pdf+free+download
    • https://cdn-cms.f-static.net/uploads/4383568/normal_5fd65bc2ee08e.pdf
    • https://cdn-cms.f-static.net/uploads/4409396/normal_6024bd06b3a13.pdf
    • https://static.s123-cdn-static.com/uploads/4388611/normal_5ff57f8f47141.pdf
    • https://static.s123-cdn-static.com/uploads/4393759/normal_5fc6d49fbe53e.pdf
    • https://static.s123-cdn-static.com/uploads/4445343/normal_5fe3e19b8ad4d.pdf
    • https://fisuvinu.weebly.com/uploads/1/3/4/4/134497747/sadulave-vogufipo-xibebite.pdf
    • https://xitodilizunew.weebly.com/uploads/1/3/4/1/134108755/2017351.pdf
    • https://gorixiboxizamo.weebly.com/uploads/1/3/4/5/134589430/monawugo_ninerakib_vumudiju_zizoxopore.pdf
    • https://merelakududeva.weebly.com/uploads/1/3/2/3/132303156/sazifufuw_minodemamo_zerelu.pdf
    • https://cdn-cms.f-static.net/uploads/4501770/normal_5fd22f86ca025.pdf
    • https://fipoxojumudex.weebly.com/uploads/1/3/4/6/134649093/loxipuvaxenar-miwosadorutoba.pdf
    • https://zudobusida.weebly.com/uploads/1/3/5/3/135330479/909308.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://bef89f6e-6323-4b84-ad9d-a44490bfcc4f.filesusr.com/ugd/96768c_81a4886ffd5d4903b8eee607ed833655.pdf?index=true
    • https://s3.amazonaws.com/dojivewobasuval/cheap_formal_dresses_adelaide.pdf
    • https://8d5bcf17-53f2-4f21-b585-7a27aef14131.filesusr.com/ugd/7baf93_a6b9f7c487c74f829b239a8ecf091244.pdf?index=true
    • https://43ca01ad-4a7a-4a47-a5a7-c4a0f95adedc.filesusr.com/ugd/7e0eb0_e2c040a6755548dc97d471226bfe36fe.pdf?index=true
    • https://aee666f7-65d2-4416-8089-42e5bd85255d.filesusr.com/ugd/c4036c_02e4002ef2d64dddbe7d450667026c35.pdf?index=true
    • https://d25e5d79-f3dc-43ab-8538-58f2f4730235.filesusr.com/ugd/898300_6db8a6247f41427ea6ebd7684482e0bb.pdf?index=true
    • https://s3.amazonaws.com/tasufagijaremo/37777552946.pdf
    • https://s3.amazonaws.com/punurum/sadapebefalimiguduge.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_off000138c3.bin
9ed9e72c679a5cbfa66143cbbe55259fc28630d89dd0b9a60ac391fc31610a7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x138C3 5884 bytes
font_01_sfnt_off00014cd4.bin
983e3d94d823bf13fce4b4680503ac60148aef48a675f3f15d35104d99a8e154		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14CD4 12804 bytes

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