Malicious PDF — malware analysis report

Static analysis result for SHA-256 89e3259099d513d1…

MALICIOUS

PDF

71.5 KB Created: 2020-12-29 16:11:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 44cd36771bb8fce003a83991be63071f SHA-1: 9a68c3c5f543bb51dca65265347f7823950029e6 SHA-256: 89e3259099d513d1087e16913aaff27c1a6e31e2cbb1d2b3fa6aca9a53285111
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, appears to relate to a 'Sun broadband prepaid unlisurf promo', suggesting a lure for phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffnew.ru/strik?utm_term=sun+broadband+prepaid+unlisurf+promo PDF link annotation
    • https://mepafuxutare.weebly.com/uploads/1/3/4/6/134660934/5b8bf3948c1e.pdfIn PDF document text
    • https://kafedujewerom.weebly.com/uploads/1/3/4/6/134622586/91817ee3b3efc14.pdfIn PDF document text
    • https://xuzofetix.weebly.com/uploads/1/3/4/3/134371052/vavofopilizene.pdfIn PDF document text
    • https://zukamukenipebo.weebly.com/uploads/1/3/1/3/131380388/eec5425dc90c21.pdfIn PDF document text
    • https://nezejigon.weebly.com/uploads/1/3/4/6/134611081/wadekitumaxovu-pamujavotadi-kimujuxijubek.pdfIn PDF document text
    • https://gatiwisukebemo.weebly.com/uploads/1/3/1/4/131438587/b0d885f3a.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/9716414f-36b8-4a5e-9ccd-d5292e1b6fa8/2020_olympics_dates_wrestling.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53011eb2-31cc-48a8-92a9-0aa6b5e2cbf8/zazijifitane.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96963290-d10b-4547-9dae-9ea1f4b0ac2c/aces_high_game_rules.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4fcdd77-c209-48ae-8f63-44d7987dac03/mathews_high_school_va.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a25d9ee6-ee43-48bd-8386-a4018a52b23f/field_and_stream_3_person_dome_tent_instructions.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB36 5428 bytes
SHA-256: dd4a6253627c85dc08ff8fdbb1cd5b178bc358aca8f7180a068eda60c33116d3
font_01_sfnt_off0000ed8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED8A 10512 bytes
SHA-256: a066eeb15c506974df5dbf8f8ee79cea6bbea450e92e2aec5dcfc936677ce7fd