Malicious PDF — malware analysis report

Static analysis result for SHA-256 b44765a07c77d937…

MALICIOUS

PDF

112.2 KB Created: 2020-12-23 19:21:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: cd7e0211c07f165f7d3cda298528031d SHA-1: 2daf57fe02fa8aa067769391359d7de4be582031 SHA-256: b44765a07c77d93777224308da665039778718ab41a25d70cc724a10141fa2c0
164 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including one to 'trafficel.ru', suggesting a link farm or phishing attempt. The presence of a 'download button' heuristic and ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links indicate it's designed to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/strik?utm_term=mit+application+deadline+early+action+time PDF link annotation
    • https://cdn.sqhk.co/gotirawuz/Hrig1ji/lafime.pdfIn PDF document text
    • https://todurudivi.weebly.com/uploads/1/3/4/3/134344361/1288125.pdfIn PDF document text
    • https://cdn.sqhk.co/wemofisejaf/djfQWhf/67927852239.pdfIn PDF document text
    • https://panidulupeju.weebly.com/uploads/1/3/0/9/130969186/0a8861bc1.pdfIn PDF document text
    • https://xowanejizaki.weebly.com/uploads/1/3/1/8/131871556/6934586.pdfIn PDF document text
    • https://nasakavagupudo.weebly.com/uploads/1/3/4/7/134766537/5260373.pdfIn PDF document text
    • https://zepodafato.weebly.com/uploads/1/3/4/8/134880008/04ee5.pdfIn PDF document text
    • https://cdn.sqhk.co/wemupaxuziv/nGij8ij/9343722137.pdfIn PDF document text
    • https://cdn.sqhk.co/xuwisagilevi/ajhfIif/real_drift_car_racing_download_apk.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/2426f1ca-6a18-4d7b-bfed-452ad4bdbd9c/potenil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fe90114-7e63-4738-9f59-9af35838aed2/7652841196.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001602b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1602B 5148 bytes
SHA-256: 6ecbb505566eddf5a2903418a1969b86959c946da05bedbd8de6d54a161a902f
font_01_sfnt_off000171ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x171AB 13612 bytes
SHA-256: e3f47711900e85cca08b068e0c62f3dd5d16ff3eb7cd2cc1b22eb1bc82996302
font_02_sfnt_off00019dff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19DFF 16092 bytes
SHA-256: 2c5f1a2e3d9f683f6a217a47aeaaae813f7d4ef732a5ff54a929695507d09140

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