Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe4dd730e1e12332…

MALICIOUS

PDF

74.0 KB Created: 2021-05-31 20:23:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 09965c356cca5565e87f908be87e5a36 SHA-1: 1464a6572e149549b0469b8908981423f3681c43 SHA-256: fe4dd730e1e123327be5b1e2c7447d9a9ab5b22b75d54d476e0d6ebe148bd564
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a large number of external links, many of which are likely part of a link farm designed to improve search engine rankings for specific terms, such as 'Ingenico ict220/250 manual'. The primary malicious activity observed is the embedding of numerous external URLs, suggesting a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://chcial.ru/pbw?utm_term=ingenico+ict220%252F250+manual
    • https://cdn-cms.f-static.net/uploads/4417214/normal_6018cba012877.pdf
    • https://kagoxikefo.weebly.com/uploads/1/3/4/6/134649289/aac7119cb06de95.pdf
    • https://cdn-cms.f-static.net/uploads/4416327/normal_6048f62918f2e.pdf
    • https://static.s123-cdn-static.com/uploads/4381287/normal_5fce791237301.pdf
    • https://cdn-cms.f-static.net/uploads/4476148/normal_5fea370a7a1d0.pdf
    • https://cdn-cms.f-static.net/uploads/4454163/normal_606a86a55b380.pdf
    • https://static.s123-cdn-static.com/uploads/4491673/normal_5fed62c81680d.pdf
    • https://cdn-cms.f-static.net/uploads/4406809/normal_605796a106b21.pdf
    • https://static.s123-cdn-static.com/uploads/4452381/normal_5ff637f6e3497.pdf
    • https://zajolapa.weebly.com/uploads/1/3/0/7/130776493/d170daa40.pdf
    • https://cdn-cms.f-static.net/uploads/4445570/normal_6015dc20e024b.pdf
    • https://static.s123-cdn-static.com/uploads/4501054/normal_5fcbaa22af54b.pdf
    • https://cdn-cms.f-static.net/uploads/4365601/normal_603232af26a18.pdf
    • https://cdn-cms.f-static.net/uploads/4369302/normal_6017840c6705f.pdf
    • https://viduxetejogat.weebly.com/uploads/1/3/4/6/134600114/58109ae03.pdf
    • https://static.s123-cdn-static.com/uploads/4500183/normal_5ff0c4e5e9849.pdf
    • https://figajusare.weebly.com/uploads/1/3/4/6/134610400/1528134.pdf
    • https://cdn-cms.f-static.net/uploads/4427793/normal_5fd970ab01a90.pdf
    • https://cdn-cms.f-static.net/uploads/4369183/normal_5fd24fb9e682a.pdf
    • https://cdn-cms.f-static.net/uploads/4374699/normal_5fd3849c229f6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/63a093d5-1250-4a57-886a-2379570b4565/71910514237.pdf
    • https://uploads.strikinglycdn.com/files/d7128c4d-be3a-4d3c-92b9-f54565a6f417/pajaxizumeg.pdf
    • https://uploads.strikinglycdn.com/files/6953a4e1-6251-433c-b760-816bc220ecbe/69935690495.pdf
    • https://uploads.strikinglycdn.com/files/57507ed5-03aa-4c47-9585-d6adc23d53e8/bblia_de_estudo_matthew_henry.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d534.bin
7278a8ae1819b9a6c4b12f4f4d975aaa2143966a18d917f23f78d98e1bef0998
pdf-font-stream PDF embedded font (sfnt) at offset 0xD534 5100 bytes
font_01_sfnt_off0000e67e.bin
0d77aa5f5bcae307b6a0b65acfde333ff10d57e530a96cbef35e260f96657335
pdf-font-stream PDF embedded font (sfnt) at offset 0xE67E 10488 bytes
font_02_sfnt_off00010a8e.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A8E 4324 bytes