Malicious PDF — malware analysis report

Static analysis result for SHA-256 59d5cf0e7227290c…

MALICIOUS

PDF

82.0 KB Created: 2021-03-10 02:00:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 434475da95712be3a1559f83f4a965d3 SHA-1: b36f965bfea9d29bef84bb91167d1d52d374e45f SHA-256: 59d5cf0e7227290c32ed39a43cca2c59bcf7fd6529bc6ee5ed7716cb7b7dde4e
164 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM' suggesting a large number of outbound links. The document body, though heavily corrupted, contains a book title which, combined with the external links, points towards a phishing or scam attempt. The presence of ClamAV detection and ML flagging further supports its malicious nature. No scripts were extracted, but the PDF structure itself is indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://dugedepap.ru/strik?utm_term=anna+todd+after+series+book+set PDF link annotation
    • https://vufagejibuto.weebly.com/uploads/1/3/1/4/131483336/mamujikifururenugun.pdfIn PDF document text
    • http://idealslim-italiaofficial.site/form_reg-1_onlinecktd0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469847/normal_604212c773deb.pdfIn PDF document text
    • http://ourfutures.space/paroles_le_temps_des_cerisesrnzjh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458839/normal_60480624dffcc.pdfIn PDF document text
    • https://webimilosajepi.weebly.com/uploads/1/3/4/8/134859137/zuwafu_movefejofosi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d50faa1-c514-4c96-a41b-10ec39d7386d/without_you_there_is_no_us_goodreads.pdfIn PDF document text
    • https://s3.amazonaws.com/gavexilatuvitaz/22681770702.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92409dae-084b-4c02-a8ec-e18dd4c03dd7/sigmund_freud_theories_of_personality.pdfIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/66491370960.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/jutanax.pdfIn PDF document text
    • https://299bc67c-4c9a-44ea-852c-18f2d39dca40.filesusr.com/ugd/954c8b_e779fc60351b4c4a8801c58cf157a8cd.pdf?index=trueIn PDF document text
    • https://e22e8d81-f41f-4d51-abb1-39b19d2d32bb.filesusr.com/ugd/96bf9d_1063a8553e1d4514acc931207a3d8ee6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/esc_acute_heart_failure_guideline.pdfIn PDF document text
    • https://a50dbba5-e4fd-40cc-afa9-a45495a5accf.filesusr.com/ugd/7f929b_8c79247a9d32425cbb613133b3f19193.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/44a19a7e-4870-4acd-ae6a-cb47accd4d29/21954096099.pdfIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/bombsquad_mod_apk.pdfIn PDF document text
    • https://36425c1f-c329-48aa-845d-1f8252cb45c8.filesusr.com/ugd/01d500_759cc0ce19c54f5387c57a6ee8e86ee1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbed33c4-0a4c-4bad-be8b-65029286cd49/tinijadutus.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4FB 5060 bytes
SHA-256: ee97c322931789893e4806a0c01ea588b053702cf0ac89d03fe1b520d139534c
font_01_sfnt_off0001063e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1063E 2944 bytes
SHA-256: 0854e157a5ecb2bd8d1c4c056b5899396a4ebdf589cf47b5758c5b3e4d2c306e
font_02_sfnt_off00011045.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11045 12472 bytes
SHA-256: 87ca37087294e6a9e6a900704d763a4e66a08f907d90fe813774a821ce2b0910

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