Malicious PDF — malware analysis report

Static analysis result for SHA-256 95a12a2e55582d63…

MALICIOUS

PDF

80.9 KB Created: 2021-03-24 03:44:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 07dd9faecd479e49a0460a4302d7cf3a SHA-1: 2f1a3bc60d172c69d5a286d596d653571c0ebae2 SHA-256: 95a12a2e55582d63e121a000e50e145f12390f4e46e806aec6ec5b5706f1fb40
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous external links, indicative of a link farm or phishing lure, and a ClamAV detection for Pdf.Phishing.Trojan. The presence of a download button lure and a callback phishing pretext further supports a malicious intent. The primary URLs identified are likely part of the attack infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://seumenha.ru/123?utm_term=responsive+email+template+html+code+for+outlook
    • http://kivafijap.mywebcommunity.org/nafumunipegobulam.pdf
    • https://geroguvipem.weebly.com/uploads/1/3/4/4/134465684/0fc6b7afc.pdf
    • https://nufewaxitobazat.weebly.com/uploads/1/3/4/7/134748461/gomuko.pdf
    • http://bumumapa.mypressonline.com/53528818223.pdf
    • http://topukovatawosu.sportsontheweb.net/60018485381.pdf
    • https://sowidokobixu.weebly.com/uploads/1/3/1/8/131856306/96f09d9.pdf
    • http://fozivot.mypressonline.com/84169679045.pdf
    • https://cdn-cms.f-static.net/uploads/4470972/normal_604db15f23b05.pdf
    • https://biteledazuxol.weebly.com/uploads/1/3/4/3/134315761/8336638.pdf
    • https://potemoguzoka.weebly.com/uploads/1/3/4/6/134646314/3034844.pdf
    • https://cdn-cms.f-static.net/uploads/4373502/normal_6010c4ca201bb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/dccf6115-b8fa-43c8-9b43-af731adc66f9/julakiroxojoxoxamoni.pdf
    • https://s3.amazonaws.com/faduxodiwo/85th_constitutional_amendment.pdf
    • https://s3.amazonaws.com/folexapurilowe/wogelasivisiwolupaloz.pdf
    • https://667abc8f-92ca-45d9-bc9d-789c80a68858.filesusr.com/ugd/dcd78f_1712b841578e4b19b4af7a66c57ccc61.pdf?index=true
    • https://486bfeb6-87d8-40a3-812f-3449909c9139.filesusr.com/ugd/81b904_035476b53fc34f7d92b2ac5009bf44d8.pdf?index=true
    • https://233b4d2f-9c44-4004-b776-098ebc281e6f.filesusr.com/ugd/7f980c_8eb0999945304d289bdef47264c94811.pdf?index=true
    • https://9afb1793-bc57-4514-bb46-74e980466609.filesusr.com/ugd/11f207_ef2478b9ed5543e1a8680813954507a9.pdf?index=true
    • https://944bcc21-9f45-42c2-9889-8cf837fa5d1c.filesusr.com/ugd/50f869_7c2726cb2fe842e5b75d0776eaa3d7df.pdf?index=true
    • https://s3.amazonaws.com/xamibudasagas/paladins_battlegrounds_free.pdf
    • http://xirofapinowud.atwebpages.com/24514472528.pdf
    • https://uploads.strikinglycdn.com/files/ae140655-321a-4ceb-8161-da3f14d36040/edge_of_the_empire_dice_roller.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_off0000fd64.bin
dc9c580ea9505c39e6241e93de9072a582460d7b5fc33b819f90729a7e296f4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD64 5528 bytes
font_01_sfnt_off0001100a.bin
27507032c420df1c159c995748da17f224032ad240a24b368128f38fa1db3879		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1100A 11196 bytes

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