Malicious PDF — malware analysis report

Static analysis result for SHA-256 aca44018553e4d82…

MALICIOUS

PDF

65.9 KB Created: 2020-11-09 19:41:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 866ffa202add5fa6e9d6fca403c16706 SHA-1: 126603379ab692458fa4a157f08fd71cb6ac9fcf SHA-256: aca44018553e4d820c060b3d6ab12ca42a18763c8301b99fe404356f7f33f098
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one specifically pointing to a URL that appears to be part of a keyword-based lure for a Vizio TV manual. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a phishing or scam attempt. ClamAV also detected this file as 'Pdf.Phishing.Trojan'. While no scripts were explicitly extracted, the nature of the links and the phishing detection suggest a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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/aws?keyword=d24f-f1+vizio+tv+d+series+24+inch+manual
    • https://cdn-cms.f-static.net/uploads/4369917/normal_5fa3740058cca.pdf
    • https://cdn-cms.f-static.net/uploads/4368972/normal_5f977fc3c6a98.pdf
    • https://fogujudusimasob.weebly.com/uploads/1/3/4/7/134713994/7779e197a066f5.pdf
    • https://cdn-cms.f-static.net/uploads/4414501/normal_5fa956de86a56.pdf
    • https://fijefozumomaba.weebly.com/uploads/1/3/4/4/134491855/mevasisesipiwi_nidiwijew.pdf
    • https://cdn-cms.f-static.net/uploads/4366321/normal_5f89576db8704.pdf
    • https://folanejo.weebly.com/uploads/1/3/0/7/130776558/430ea980fcae86.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/5048f452-a583-46c7-8d1e-a7d913500ba7/art_history_timeline.pdf
    • https://s3.amazonaws.com/kavitokolezub/ablaze_for_god.pdf
    • https://uploads.strikinglycdn.com/files/cf5b254e-6e99-48e3-a32d-6350f06a7424/how_to_download_onlyfans_videos.pdf
    • https://uploads.strikinglycdn.com/files/52247d23-44ef-4c4e-8bbd-30c241a7f120/37304248829.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c19e.bin
6995e386166178928b47165f7f49a08f27ac3d4ec8bbfdb1dc23ef31dadf0db6
pdf-font-stream PDF embedded font (sfnt) at offset 0xC19E 5672 bytes
font_01_sfnt_off0000d4ee.bin
96a595fffb3d34a0198dd796f6cc0fe4611c0b09df57f8214a364db7d6cb4897
pdf-font-stream PDF embedded font (sfnt) at offset 0xD4EE 10628 bytes