Malicious PDF — malware analysis report

Static analysis result for SHA-256 b61feacb7ac6f422…

MALICIOUS

PDF

73.7 KB Created: 2021-03-15 19:10:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 1ef45ee6014d18f74b808c1c2ac20219 SHA-1: d6bd4e6133d08078dfde3db9ed33d0cc7d1a8feb SHA-256: b61feacb7ac6f422d9602f6f074a419df9d523af62bad689abae46952d631f60
206 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or a trojan. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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://ponafet.ru/strik?utm_term=ozeri+scale+battery+change PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4386824/normal_600a73335c204.pdfIn PDF document text
    • http://rodufedizukol.22web.org/58657037701.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384164/normal_6005acc330e8a.pdfIn PDF document text
    • https://womerakuketuzal.weebly.com/uploads/1/3/1/8/131856195/berijox.pdfIn PDF document text
    • http://reetodo.online/destroyer_2018_parents_guidemavy5.pdfIn PDF document text
    • http://prostotit.site/can_hit_kill_jireny21jg.pdfIn PDF document text
    • https://ponivigaxuk.weebly.com/uploads/1/3/5/3/135313456/ramarinisava_wewudufoxevu.pdfIn PDF document text
    • http://usesucre.pro/tupaxaktf8bv.pdfIn PDF document text
    • http://konovulibugu.iblogger.org/friendship_quotes_in_english_images.pdfIn PDF document text
    • https://dilozekilofak.weebly.com/uploads/1/3/5/9/135968706/fumobibulerexez_tamarapofilirop_satax.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pikaderobiw.atwebpages.com/50053103380.pdfIn PDF document text
    • http://malogamezomido.rf.gd/fofagazufawi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd9c43a0-92be-4bd3-944d-afdf9dd146bc/4692297639.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03ed38c1-7603-41aa-8e23-8cedea378218/supep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eff810b6-25ff-40d7-946c-74be390b07cb/gesopapigedunujosoleva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/356a5812-7509-44ad-8410-10a705b2e49c/77483221217.pdfIn PDF document text
    • http://zubuzonaf.rf.gd/57369175419.pdfIn PDF document text
    • http://bumejefivoxigo.myartsonline.com/boluvizigibuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b882b71-f39b-41d9-ab56-4bb6f49fc65d/sijolozajivogikulijo.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_off0000e12e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE12E 5380 bytes
SHA-256: 1bf5d3ea0a99ca3491a15e2c1a3ea33e853a5158a1c7522175095dfa7df237eb
font_01_sfnt_off0000f37e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF37E 11192 bytes
SHA-256: b2d43ed81b5cc4a9fba2c01aededcbbfd5ebd81fc1baf3c52864e42e46e20a62