Malicious PDF — malware analysis report

Static analysis result for SHA-256 dda54ad177235db4…

MALICIOUS

PDF

104.1 KB Created: 2021-03-24 23:56:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e4136ebd6b8790bd2e60be57878bf707 SHA-1: 272a4688f6a21621d01a6a38a9a3b683d779297b SHA-256: dda54ad177235db4465478ed3b7c71cf637d4c23ef88b152041912992a5de33b
196 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of an advance-fee scam lure. It contains numerous external links, including one to dafemum.ru, suggesting it is designed to redirect users to malicious websites. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a phishing attempt.

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/award?keyword=cerere+demisie+pdf+download
    • https://neluposu.weebly.com/uploads/1/3/4/3/134369170/3306814.pdf
    • https://cdn-cms.f-static.net/uploads/4476301/normal_5fd65652823e6.pdf
    • https://cdn-cms.f-static.net/uploads/4408461/normal_600ba8aabfc10.pdf
    • https://cdn-cms.f-static.net/uploads/4465145/normal_6019bfb5424f7.pdf
    • https://lurukise.weebly.com/uploads/1/3/4/4/134454795/2355550.pdf
    • https://cdn-cms.f-static.net/uploads/4501206/normal_5fe9096e9e1df.pdf
    • http://fuzuwozozat.mypressonline.com/63141627621.pdf
    • https://rusokupos.weebly.com/uploads/1/3/4/4/134468665/xiwevinasozupijeku.pdf
    • https://cdn-cms.f-static.net/uploads/4488316/normal_601a2e243f161.pdf
    • https://cdn-cms.f-static.net/uploads/4413108/normal_6050ee31026b3.pdf
    • https://cdn-cms.f-static.net/uploads/4414680/normal_600fda750a1e4.pdf
    • https://static.s123-cdn-static.com/uploads/4426974/normal_5fc92ef4af70c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/08b02be8-a38e-4bab-bbce-8ca58421e834/schwinn_comp_bowflex_instruction_manual.pdf
    • https://uploads.strikinglycdn.com/files/dd39ed22-b15d-44c2-b1d0-4ce2fe739203/intermatic_dt620_timer_programming.pdf
    • https://uploads.strikinglycdn.com/files/03527379-3207-42b9-97bf-5644ec3b565b/why_is_hajj_one_of_the_five_pillars.pdf
    • https://uploads.strikinglycdn.com/files/5d0600c0-13aa-4a86-bece-6210585e956c/99279327852.pdf
    • https://s3.amazonaws.com/musokejixami/bedubijogad.pdf
    • https://s3.amazonaws.com/sixenogafopoj/financial_reports_em_portugues.pdf
    • http://movasedumanepe.onlinewebshop.net/auditing_books_for_b._com.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014b6b.bin
97b66b4fb6dc277d7b844ec9b826ad2518ae30ac7aba3491280894c728e25406		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14B6B 5012 bytes
font_01_sfnt_off00015c62.bin
8f40efcf861d6ec814c9bf6042cf33d4c3ef53deefd94cac56b7204bd27b8512		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15C62 12048 bytes
font_02_sfnt_off00018552.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18552 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.