Malicious PDF — malware analysis report

Static analysis result for SHA-256 a083bed5121888f0…

MALICIOUS

PDF

64.5 KB Created: 2020-11-19 17:31:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: bf8264d1f91135c708f098322d872d41 SHA-1: 30a0260b0a97c70d832479662c29eeb11f478b81 SHA-256: a083bed5121888f0aae66ff76b2d3c4fbf608caf816c4bfaa50c308ce134ffed
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'https://trafficel.ru/123?utm_term=do+schick+hydro+blades+fit+quattro+handle', which is a strong indicator of a phishing or malware distribution attempt. The document body, though heavily obfuscated, suggests a lure related to product compatibility, which is a common tactic in phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafficel.ru/123?utm_term=do+schick+hydro+blades+fit+quattro+handle PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417309/normal_5fa6e32b5969c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381297/normal_5faf31c9834d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488116/normal_5fb4a3bc124d7.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/2f98fa60-58ca-4fac-8643-f3a9552f6d7d/gowozirigelesijakegazuveg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfdd510f-7834-495e-808d-5d141e0d0dfe/league_of_legends_rammus_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77b53fc9-723f-4203-81b8-2ad2c89e515a/faxababalujivenale.pdfIn PDF document text
    • https://s3.amazonaws.com/gurowozenupifi/jerry_kuhnhausen_1911_shop_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0b2c346-95b5-4334-bd0c-c8adc47ca977/motorola_xt1031_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wovitiku/75826290818.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/vegirulanedup.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/examination_officer_interview_questions_and_answers.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_off0000bab4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAB4 5540 bytes
SHA-256: 75d5b7c6dc29f5db9237aed24625357f6d38142303c2d3dd854f92a28df981f6
font_01_sfnt_off0000cd8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD8C 11392 bytes
SHA-256: fd3d61e05defc8f8a35e2dbb52c750a0978eff405aaa3c23e8d02a6d15d6d0cf