Malicious PDF — malware analysis report

Static analysis result for SHA-256 d111210bd6bec596…

MALICIOUS

PDF

73.2 KB Created: 2021-05-26 05:47:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea98e8dff983b09aeefb953988cc1361 SHA-1: d6327112592c7fd8b78bb78e57eedbe6472b2970 SHA-256: d111210bd6bec596c726d566533a45b9928aff3c2fa96969d90e9c720cbf4f63
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, suggesting it is part of a link farm or designed to redirect users to potentially harmful websites. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external URIs strongly suggest an attempt to exploit users through redirection, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://dafemum.ru/strik?utm_term=how+to+fix+hammer+stapler
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/335f78bc37c78.pdf
    • https://cdn-cms.f-static.net/uploads/4496014/normal_605af6406e7a6.pdf
    • https://cdn-cms.f-static.net/uploads/4422378/normal_60147918e055c.pdf
    • https://cdn-cms.f-static.net/uploads/4393193/normal_604d8dee59003.pdf
    • https://cdn-cms.f-static.net/uploads/4403429/normal_60293adf3c9f7.pdf
    • https://vunidiripoga.weebly.com/uploads/1/3/1/4/131453449/kikubowi.pdf
    • https://cdn-cms.f-static.net/uploads/4367920/normal_60286e04054a0.pdf
    • https://gidutuzewefira.weebly.com/uploads/1/3/1/3/131380066/robaw_xavis.pdf
    • https://cdn-cms.f-static.net/uploads/4371788/normal_6032937ade581.pdf
    • https://gewujezugiwo.weebly.com/uploads/1/3/4/7/134754524/943176.pdf
    • https://static.s123-cdn-static.com/uploads/4466662/normal_5ff903e4efb5d.pdf
    • https://kevefizi.weebly.com/uploads/1/3/1/8/131871405/nafaxogek.pdf
    • https://cdn-cms.f-static.net/uploads/4366382/normal_60240d228479d.pdf
    • https://nofefikow.weebly.com/uploads/1/3/4/5/134510094/750ed5c33b7ee.pdf
    • https://cdn-cms.f-static.net/uploads/4413011/normal_602ad2296facd.pdf
    • https://static.s123-cdn-static.com/uploads/4403534/normal_5fecc5125b0b9.pdf
    • https://tokuniti.weebly.com/uploads/1/3/4/3/134331772/1478646.pdf
    • https://fobabugukejapa.weebly.com/uploads/1/3/4/5/134576868/jodegeduz.pdf
    • https://static.s123-cdn-static.com/uploads/4443326/normal_6005f58f89c0d.pdf
    • https://padixegidenu.weebly.com/uploads/1/3/1/1/131164435/fizokogem.pdf
    • https://cdn-cms.f-static.net/uploads/4470979/normal_6016295cc6124.pdf
    • https://static.s123-cdn-static.com/uploads/4495846/normal_5fc721bba5f62.pdf
    • https://cdn-cms.f-static.net/uploads/4472776/normal_602b87a85aa82.pdf
    • https://cdn-cms.f-static.net/uploads/4416131/normal_604f991172fcd.pdf
    • https://cdn-cms.f-static.net/uploads/4412757/normal_602476120c8a4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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_off0000df07.bin
bff1dac3be1b0ee722f670b523d5300d9b6aa6d05264b1f8a42214aa93c3b067
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF07 5264 bytes
font_01_sfnt_off0000f0d8.bin
bddf599872d7589954dd06ed019d5e59e852ab119d9f3743afb380d943ef78d5
pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D8 10804 bytes