Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd3d833cda1a4697…

MALICIOUS

PDF

73.8 KB Created: 2020-12-29 15:40:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: affa2e23ae91a0c528a2474dbae5beb4 SHA-1: d2034aa77cc5f02aa23c2ee07513c483ea9bf7f7 SHA-256: cd3d833cda1a46978c2d23b43e4d3f37b48a866550b596a7a1af8957a9c4befd
194 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics, including a critical alert for linking to known malicious redirector infrastructure and a high ML classifier score. The presence of advance-fee scam language strongly suggests a phishing attempt. The embedded URL leads to a redirector, likely serving as a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/strik?utm_term=98+arcade+blvd+sacramento
    • https://cdn.sqhk.co/diratukuz/iMgigfP/gmail_sign_up_business_account_free.pdf
    • https://cdn-cms.f-static.net/uploads/4456135/normal_5fd11691be1d3.pdf
    • https://cdn.sqhk.co/vowibesep/Eicjigf/durinomejizipujugavuferu.pdf
    • https://sirawomaperuli.weebly.com/uploads/1/3/1/3/131398091/buwafudo.pdf
    • https://cdn-cms.f-static.net/uploads/4453537/normal_5fb7c49aea9bc.pdf
    • https://cdn-cms.f-static.net/uploads/4393772/normal_5fbb37b1d3aee.pdf
    • https://cdn-cms.f-static.net/uploads/4453142/normal_5fd7b30235c49.pdf
    • https://cdn-cms.f-static.net/uploads/4410976/normal_5f9649e0cd002.pdf
    • https://cdn-cms.f-static.net/uploads/4366625/normal_5f8751249b861.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/ladiwuzetawedi/cmi_informatique_chalon_sur_saone.pdf
    • https://uploads.strikinglycdn.com/files/68295b25-1178-4de4-ae0b-f837015a5398/growling_grass_frog_distribution.pdf
    • https://s3.amazonaws.com/dofufiri/solasewuzovezubikebov.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_off0000d862.bin
fc22954278836709e7f48845a65dabe5705810f1874d2c0eb9717dc28e43dc87
pdf-font-stream PDF embedded font (sfnt) at offset 0xD862 5540 bytes
font_01_sfnt_off0000eb1b.bin
78e94e2e47178245ca437e301e19f50dc99845ecc02da2ba30fe2b1e34051cc2
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB1B 2092 bytes
font_02_sfnt_off0000f4c0.bin
455aa5e8b088da8959589a7a6417dc2e91f50451a87e1d8f640f6098c358431a
pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C0 10976 bytes