Malicious PDF — malware analysis report

Static analysis result for SHA-256 26f639f4c84f7ae3…

MALICIOUS

PDF

82.0 KB Created: 2021-05-01 23:29:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d35ca4f8951e2f66de8ea6174f78a50 SHA-1: e59da5917be3a8deee4c108a83d9d06632c6482b SHA-256: 26f639f4c84f7ae3a5d4f37b76a6ec6efae8d9c8bef006af7f2b7a5242b7dc93
196 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. The 'SE_ADVANCE_FEE_SCAM_LURE' heuristic indicates the document's content is designed to trick users into paying fees for a non-existent prize or parcel. The presence of a large number of external links, including a link farm, further supports the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://dafemum.ru/strik?utm_term=bally+slot+machines+list
    • https://roturusuwanowus.weebly.com/uploads/1/3/4/3/134363773/riponanu-pamefan.pdf
    • http://fikakutipid.mygamesonline.org/canon_t5i_manual.pdf
    • http://tinubawolu.mywebcommunity.org/69562009245.pdf
    • https://cdn.sqhk.co/labojime/11hbigf/varamumogikirageje.pdf
    • https://wefizaxire.weebly.com/uploads/1/3/0/9/130969527/84ac2c30f71.pdf
    • http://mujubow.getenjoyment.net/wewezev.pdf
    • http://dizurexemubegog.mygamesonline.org/access_control_mechanism_in_network_security.pdf
    • https://cdn.sqhk.co/zezegawutogu/UnUgdwA/38935841902.pdf
    • http://rigoditibalun.mywebcommunity.org/dupapidakomelax.pdf
    • http://fuxisileza.mywebcommunity.org/accord_de_paris_sur_le_climat.pdf
    • http://damewumesigalut.medianewsonline.com/74514229063.pdf
    • https://mabavelege.weebly.com/uploads/1/3/0/7/130775551/8256650.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xifabilejilab/aerial_apparatus_driver_operator_study_guide.pdf
    • https://s3.amazonaws.com/daselex/wokamevikobisizepanaj.pdf
    • http://tipipigi.atwebpages.com/gelovexamijolatoz.pdf
    • https://s3.amazonaws.com/supefujoxopubu/bogategufevuzeropevedabe.pdf
    • https://s3.amazonaws.com/tapexiw/zafipoxilatifuferim.pdf
    • http://xekabotiwuker.atwebpages.com/sistem_bilangan_real_kalkulus.pdf
    • https://s3.amazonaws.com/wajibile/cnn_student_news_quiz_answer_key.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_off000101e5.bin
5ee39ab2ef3fcc665150b136a9863409da57558e7ce0264ed30ccadb5071b8dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101E5 5092 bytes
font_01_sfnt_off0001131d.bin
a0bb7c0652e22e921554c75066081563c6acc5ec4fd02fd1dc9e690f9a179255		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1131D 11704 bytes

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