Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e070f64b7961768…

MALICIOUS

PDF

80.0 KB Created: 2021-01-31 01:32:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: ea8f5072d18120f58411b297f1c3849c SHA-1: c50503f2aa4075eaa9f24e5371e7ba48c2388fcb SHA-256: 4e070f64b7961768d58ba069edb43d59b3152bdd598bc17020a063d1d09703b8
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, indicating a high likelihood of malicious intent. The presence of numerous external links, particularly to domains like seumenha.ru and tamakar.xyz, suggests a phishing or SEO manipulation scheme. While no scripts were explicitly extracted, the PDF structure and link farm behavior are consistent with techniques used to distribute malware or redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://seumenha.ru/aws?utm_term=antenna+channel+guide+denver PDF link annotation
    • http://tamakar.xyz/ged_book_onlineewyec.pdfIn PDF document text
    • https://cdn.sqhk.co/vozaxodep/l9gdBif/14928010161.pdfIn PDF document text
    • https://fojozotewimoko.weebly.com/uploads/1/3/5/3/135324817/7389ae49.pdfIn PDF document text
    • http://zarabatyivat.ru/7438214627eaze4.pdfIn PDF document text
    • https://wubenigulusetib.weebly.com/uploads/1/3/4/7/134712949/c8958.pdfIn PDF document text
    • https://vigijamavo.weebly.com/uploads/1/3/0/9/130968937/nugowakevuwuwi.pdfIn PDF document text
    • https://zofudugopevemob.weebly.com/uploads/1/3/1/6/131607066/lizebi_kidotasumozos_suwiretu.pdfIn PDF document text
    • https://murejisigutive.weebly.com/uploads/1/3/1/1/131164542/6136878.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/jivagajamav/58482531306.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/loxulenubani.pdfIn PDF document text
    • https://s3.amazonaws.com/dekogamik/junedexi.pdfIn PDF document text
    • https://s3.amazonaws.com/jalasilunaz/42645776121.pdfIn PDF document text
    • https://s3.amazonaws.com/wumodukubaru/adapted_self_report_altruism_scale_validity.pdfIn PDF document text
    • http://xefavab.rf.gd/technical_data_sheet_of_epoxy_paint.pdfIn PDF document text
    • https://s3.amazonaws.com/zatasipezeg/28757246850.pdfIn PDF document text
    • http://rifunasi.epizy.com/nekaravix.pdfIn PDF document text
    • https://s3.amazonaws.com/kijelopazekune/96921299212.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/71868612438.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_off0000fd7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD7D 5072 bytes
SHA-256: 7dbd76d5b720399addac3ce3f74d7032d3a937ca3ab4e039a5afa06add616a63
font_01_sfnt_off00010ebf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EBF 10596 bytes
SHA-256: 67dc9b874c651f974ff55629c84f5ee04084c33b79cf36fedcf08c1dd2a2bc7e

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