Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ff6e178a36814f0…

MALICIOUS

PDF

57.3 KB Created: 2020-12-06 22:15:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: af2e0e4f5c39b79c62331732ce1fe50f SHA-1: defc75ea04d6cb00ff0f84701c1062cd8376d582 SHA-256: 3ff6e178a36814f0afce693dbec02472da3ec5519064eb554835edd697a96211
234 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF is identified as a malicious phishing lure due to its image-only nature and embedded clickable link. The primary malicious URL, https://cctraff.ru/123?utm_term=acs800-104+hardware+manual, is flagged as a known malicious redirector. The document also contains a link farm, suggesting an attempt to generate SEO traffic or distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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.
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 57 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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/123?utm_term=acs800-104+hardware+manual In PDF document text
    • https://wofenexezut.weebly.com/uploads/1/3/4/3/134310974/89c2edbc09120.pdfIn PDF document text
    • https://jazafojof.weebly.com/uploads/1/3/4/3/134310209/2891381.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388063/normal_5fbee24556aba.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/8b84f9dd-05c5-4bd7-b230-d93285dc41b8/sudaxemonedelezikakomu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8df3c74-6221-4c84-80ac-460467ff03d7/zefubuvovexoxutusitewe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a3d1981-d186-4960-83bb-73c59923d854/52533058211.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1318a5bcb0228a2845bc9/t/5fc8eb4e153fcd789c395573/1607002959326/70967951127.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b975382a-2895-4260-a5d9-ad63842af56c/puloxupekuwolonu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf1a73fdc31513a0e92b8/1606218160120/39225754346.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3485cb59-934f-4e62-b638-347502b490cd/bodetibajuret.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aac06e3f-3ddd-451f-8ed5-5984f495238b/biguxoguvutixalibuzo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bcee940-4609-4b3c-9ee7-f9ecd580717b/diwaxokezigazu.pdfIn PDF document text
    • https://s3.amazonaws.com/wizitifowubux/infrastructure_nsw_reporting_and_assurance_portal.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_off0000a970.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA970 5768 bytes
SHA-256: 0f73901aa7fef1420e91ee569c44989e090d948c8822390cd9a075adbba0158e
font_01_sfnt_off0000bd0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD0C 8116 bytes
SHA-256: 930fd1e919b331b5c24f99563d38043e74cd13e004dcab92891f2f1774797b6b

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