Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bfeacab2dbe9c4e…

MALICIOUS

PDF

60.8 KB Created: 2021-02-15 11:56:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 0a85c4557c3d06b39f3b5bc3cbe03d07 SHA-1: 7c0664ee4da3acaf4e839f9aa1a1109eb37dfe01 SHA-256: 1bfeacab2dbe9c4e6c8ca055f344a36bb8488a84798bbde1550a4e57878f5707
214 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically `https://yafferge.ru/wb?keyword=sharp%20xe-a207%20master%20reset`. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links. ClamAV also detected it as `Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0`, indicating a phishing or trojan payload delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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://yafferge.ru/wb?keyword=sharp%20xe-a207%20master%20reset In PDF document text
    • https://cdn.sqhk.co/mugejufunij/iiCEfet/59661156977.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497687/normal_60190e9f7f683.pdfIn PDF document text
    • https://godowipi.weebly.com/uploads/1/3/4/5/134520373/3758789.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499002/normal_5fd347f57c3cc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426810/normal_5fc5ed892810a.pdfIn PDF document text
    • https://cdn.sqhk.co/saseponirifa/j6lidgd/pilirevotupejijotivijajeg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387226/normal_5fe84b68bf516.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460950/normal_60089724b844a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/borokegujuzero/45141617177.pdfIn PDF document text
    • https://s3.amazonaws.com/resisuna/jalevomubol.pdfIn PDF document text
    • https://s3.amazonaws.com/debamijizozexo/apertura_piriformis_oluturan_kemikler.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/87892758635.pdfIn PDF document text
    • https://s3.amazonaws.com/wovitiku/kadex.pdfIn PDF document text
    • https://s3.amazonaws.com/mokixetat/suspension_forme_ampoule_ikea.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/goremijegizenedamide.pdfIn PDF document text
    • https://s3.amazonaws.com/xapijifas/somufatuninowunina.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_off0000b2bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2BF 5584 bytes
SHA-256: 641b6a09949d08b4f33423627fbf060031b4f7d55e21e6938480dcc0ce6f6b37
font_01_sfnt_off0000c5a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5A0 9772 bytes
SHA-256: e14bc7df14204a13759171e9f455f96fa9e30b752f3c1991e659a61027df5602

Open this report in the interactive analyzer, or submit your own file for analysis.