Malicious PDF — malware analysis report

Static analysis result for SHA-256 b59655cf29870c9c…

MALICIOUS

PDF

75.5 KB Created: 2021-04-23 09:56:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 46ddd31d466fa55ece3ed03be49d8daf SHA-1: 7572c91b8bc02508e67b5c0d42df9afbfe53de56 SHA-256: b59655cf29870c9c5cbfd50d0241f10f2d4d09c6fcb12d948ebe53da199ddb3b
244 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and an ML classifier, indicating it likely serves as a redirector to malicious infrastructure. The presence of numerous external links, including one pointing to a known malicious redirector, strongly suggests an attempt to lure users to harmful sites. No scripts were extracted, but the overall structure points to a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/strik?utm_term=2009+bmw+328i+repair+manual In PDF document text
    • http://busibear.com/lowrance_elite_5x_dsip1yj9.pdfIn PDF document text
    • http://topcreditscore.info/livro_adsorop8rue.pdfIn PDF document text
    • https://zezodejesamibiz.weebly.com/uploads/1/3/1/1/131164097/debepenilomibep.pdfIn PDF document text
    • http://gbo.guru/bigetovirewatunabopurepn48sp.pdfIn PDF document text
    • https://tariroviwobin.weebly.com/uploads/1/3/4/7/134715354/zekaxukazorunapew.pdfIn PDF document text
    • http://dress-russia.ru/gewaroxedadetan55wh5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382423/normal_5fe712eed66cf.pdfIn PDF document text
    • https://gupimarozak.weebly.com/uploads/1/3/4/3/134350981/5751050.pdfIn PDF document text
    • http://telgrm.site/nee_gler_eitimde_lme_ve_deerlejujo4.pdfIn PDF document text
    • http://arevakar-travel.com/kapefejiralivajext79ch.pdfIn PDF document text
    • https://kewidanuratug.weebly.com/uploads/1/3/5/3/135323433/xomakiximiji.pdfIn PDF document text
    • https://bokosemebejira.weebly.com/uploads/1/3/0/8/130813317/soxebutadu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458404/normal_5fef9371b124e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/5e635795-491e-4526-b3f5-d93f27f0fbfa/what_are_some_methods_of_teaching.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f9ae07e-ed63-46a5-a591-7c1df0c5514a/yamaha_rx-v677_bluetooth_adapter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d82f354a-c392-4c39-9e21-423ffb56371d/peg_perego_prima_pappa_best_high_chair_replacement_straps.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9d166da-1fb3-47bf-a49c-3967891e86fb/10040268142.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d9745cc-6756-44bd-af38-6d03a2645891/what_does_cloud_nine_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41e85e03-33a4-4385-aa31-a163ba50ec20/jenux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2da042cc-ad69-4a36-af30-1ff03ef83b3a/dofubuguketimuzu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF0 5404 bytes
SHA-256: 2ea6edc18e315c8fe9ae2783fb8d9f02011e003876e09ce13009659c7cc5c92e
font_01_sfnt_off0000ef1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF1D 10416 bytes
SHA-256: 0a7ac003348eaa667dee1f10bd5d9de53916173931a129cfa8dd1e3231b1b162
font_02_sfnt_off000112ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112AD 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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