Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c81d067bda02d9c…

MALICIOUS

PDF

77.9 KB Created: 2021-03-07 15:59:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 3cd44b509874b31e768001f73fe1b87b SHA-1: 1f1d505d72e6af3ca5da2569a8d15240e7e84eb7 SHA-256: 5c81d067bda02d9cd826ca69d7eb89c0f80b39a77c7fd11b9255ebeda99afc92
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 6

  • 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.
  • 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://dafemum.ru/aws?utm_term=how+to+earn+dividends+every+month In PDF document text
    • https://jokinurelebuvet.weebly.com/uploads/1/3/1/8/131856462/501335.pdfIn PDF document text
    • https://vuxuminitemup.weebly.com/uploads/1/3/0/8/130874085/399528.pdfIn PDF document text
    • https://jedijevabepepox.weebly.com/uploads/1/3/0/7/130739982/voxet_numemarefojowun_mipigel.pdfIn PDF document text
    • https://sulajaxa.weebly.com/uploads/1/3/4/3/134362611/6181574.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483867/normal_60384387a535d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450034/normal_601bde6d3974c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499329/normal_6044239606c1f.pdfIn PDF document text
    • https://gibotexoruz.weebly.com/uploads/1/3/4/6/134634126/376f6fb513abb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373240/normal_6033f64d471a0.pdfIn PDF document text
    • https://japiravonasuv.weebly.com/uploads/1/3/4/6/134644749/mosiwavuzuv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453134/normal_600b5b526483e.pdfIn PDF document text
    • https://pigabatanez.weebly.com/uploads/1/3/1/3/131380253/22490636e2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449618/normal_5ff9873ec020d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370071/normal_600ee6e4977c2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc000263-f170-401f-abfa-6f9f0a479627/avengers_endgame_soundtrack_playlist.pdfIn PDF document text
    • https://d451e762-8e00-4155-9971-9512d28d2528.filesusr.com/ugd/b52961_ffd88ae3424e4370acff875d66743f4a.pdf?index=trueIn PDF document text
    • https://994180ce-385f-4272-9833-4a204a825e0f.filesusr.com/ugd/ec0c41_158df15cf25f44e2837808e9499ec18f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6387b409-20c4-41ea-a50f-8345072d2c6f/fender_mustang_3_amp_price.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_off0000f1df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1DF 5248 bytes
SHA-256: 1e72143c31a83857771dee3ddbd563b54144a039c2fe182e2d81d7944e6ac0af
font_01_sfnt_off000103a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103A5 10928 bytes
SHA-256: fced5fbaf63457c41fa4bed4f6946e20e827d43632b62ff27376e1ffc6a9f188