Malicious PDF — malware analysis report

Static analysis result for SHA-256 59015fcb9ddcf433…

MALICIOUS

PDF

76.7 KB Created: 2021-04-05 23:01:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f4d98661bb21a732c325eee1f6fe34da SHA-1: ed61e0d263c8ae2672de00b4f46c94f65144c894 SHA-256: 59015fcb9ddcf433999dd4dee1e38a47c2ffef9100b1f5a5a7e79a5b0b09db2d
196 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, many of which are part of a link farm designed for SEO manipulation, as indicated by the PDF_SEO_LINK_FARM heuristic. The document body, though heavily obfuscated, combined with the 'SE_ADVANCE_FEE_SCAM_LURE' heuristic, strongly suggests a phishing or advance-fee scam. The presence of embedded URLs and the ClamAV detection further support its malicious nature, likely serving as a lure to download further malicious content or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/wix?keyword=busybox+for+android+pro+apk
    • http://xufamorazogubov.sportsontheweb.net/simply_keto_system.pdf
    • https://cdn.sqhk.co/bedogipaxog/HifLaij/12841648135.pdf
    • https://static.s123-cdn-static.com/uploads/4369660/normal_600763f68607f.pdf
    • https://bumozirejukije.weebly.com/uploads/1/3/5/3/135340746/7757537.pdf
    • http://pifopusilegazo.iblogger.org/xanetobagilixilepiw.pdf
    • https://cdn.sqhk.co/goronikel/gajbXgj/98124662776.pdf
    • http://pusewuvi.medianewsonline.com/dental_light_cure_price.pdf
    • https://dupubevanedi.weebly.com/uploads/1/3/4/6/134649007/suzaboxal_fogarexalo_zaluduliten.pdf
    • https://kekixulup.weebly.com/uploads/1/3/1/4/131407102/xunur.pdf
    • https://static.s123-cdn-static.com/uploads/4492588/normal_6003cfd8009aa.pdf
    • https://detitominaxa.weebly.com/uploads/1/3/5/3/135304018/35340e79.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://bupagiji.epizy.com/alkaline_diet_chart.pdf
    • https://uploads.strikinglycdn.com/files/96c09c56-7df1-412e-b52c-8436006bd4c0/57936733135.pdf
    • https://uploads.strikinglycdn.com/files/d2c4b6c0-22d2-4f2b-a495-3b6e82fac0fb/definicion_de_investigacion_de_mercados_cualitativa.pdf
    • https://uploads.strikinglycdn.com/files/ae1ae934-bce8-45dc-ade3-a0ce6157591b/75126694383.pdf
    • https://uploads.strikinglycdn.com/files/8c209826-d460-4ca9-82ce-dac25d5070d5/tuwofoketifu.pdf
    • http://nakedaxosa.rf.gd/business_english_letter_phrases.pdf
    • https://uploads.strikinglycdn.com/files/263b5123-3443-4728-8bf9-a344bfb77121/namazebezotelofuseweb.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_off0000ed9a.bin
426614feda0944f6d09cea7f28bae5434cc03d6849b90bcae05c7aab8b240b70		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED9A 5428 bytes
font_01_sfnt_off0001002a.bin
b28f5ceead366c8204db1307f363da38c7bd63d53560170e55069df05ba4065a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1002A 10976 bytes

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