Malicious PDF — malware analysis report

Static analysis result for SHA-256 273471f3c0e9774d…

MALICIOUS

PDF

69.4 KB Created: 2021-01-12 12:35:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 0d2a55db90522a13a2e640d4fb196d4f SHA-1: d5ee5377e036ddb8fd78f235c6c05fab58090ca1 SHA-256: 273471f3c0e9774dd27a3d2803eb872b216b38cf375497fbb13ae5c3a8d3a7f5
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://cctraff.ru/aws?utm_term=calculating+distance+speed+and+time+worksheet'. This indicates the document's primary purpose is to lure the user to a potentially harmful external site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL is sufficient evidence for a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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/aws?utm_term=calculating+distance+speed+and+time+worksheet In PDF document text
    • https://static.s123-cdn-static.com/uploads/4389820/normal_5feed75d2efb1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408343/normal_5feda0cd8e377.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486534/normal_5fee1175c22b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450870/normal_5fbd1e35380d6.pdfIn PDF document text
    • https://zezevibowavaki.weebly.com/uploads/1/3/4/8/134854125/kibepenabe.pdfIn PDF document text
    • https://karaxofuko.weebly.com/uploads/1/3/5/3/135344752/6415675.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415052/normal_5fab5ffe9a431.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366055/normal_5f912cb750d83.pdfIn PDF document text
    • https://cdn.sqhk.co/bixatavafut/KidQE8w/20831666855.pdfIn PDF document text
    • https://xopisamu.weebly.com/uploads/1/3/0/7/130776659/69049e.pdfIn PDF document text
    • https://cdn.sqhk.co/fijajiles/igCqG2R/86319422262.pdfIn PDF document text
    • https://cdn.sqhk.co/fajixojemom/kgdkEGo/65561578982.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gadumagabusodel/lost_on_you_lewis_capaldi_piano_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/daselex/top_rated_hair_dryers_consumer_reports.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_off0000cef1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEF1 5548 bytes
SHA-256: 34f208d6c016567dab509bf1a0cddb72cf9b48bcc70a7ba71ff34067c32af843
font_01_sfnt_off0000e1af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1AF 11392 bytes
SHA-256: 547326cdf04454c9abe84ab9ce6029c1835e6fcdab8a39f79bc3ea574142338a

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