Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0b18a16589b815d…

MALICIOUS

PDF

167.9 KB Created: 2021-04-07 00:57:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 5cec89890d31ead83889bfcd71217596 SHA-1: ed5b5a5c55c39e1ac5c2dccd83c2437363975c61 SHA-256: f0b18a16589b815d7db7561ead9beab27f3b9e4a94e496ff7da90aeed6deeb22
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external URIs, with a high-confidence heuristic flagging it as a link farm on disposable hosting. One prominent URL, 'https://lozipotod.ru/strik?utm_term=chicas+de+alambre+libro+resumen', is identified as a potential phishing or malware distribution vector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 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.
  • 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://lozipotod.ru/strik?utm_term=chicas+de+alambre+libro+resumen PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393514/normal_6050e4d4cf1b4.pdfIn PDF document text
    • https://gurosutu.weebly.com/uploads/1/3/2/3/132303194/d799c9213331b.pdfIn PDF document text
    • http://scarcebook.com/60821670390eudqk.pdfIn PDF document text
    • https://vufoduvetuf.weebly.com/uploads/1/3/5/3/135302170/2873763.pdfIn PDF document text
    • http://supportcopyright.net/zipagowotudevamukelanuxevpgh1t.pdfIn PDF document text
    • https://jokozoxusatolof.weebly.com/uploads/1/3/1/0/131070378/1041364.pdfIn PDF document text
    • http://yachts-4-sale.com/50_inch_tv_with_120hz_refresh_rate61q2g.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419205/normal_5ff7db669173b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373241/normal_6068518336bed.pdfIn PDF document text
    • https://gavuzolarot.weebly.com/uploads/1/3/4/4/134458525/45f19f29aa7f.pdfIn PDF document text
    • https://roxogarafuxor.weebly.com/uploads/1/3/1/1/131164132/powidisozebit.pdfIn PDF document text
    • http://de-bewertung-id-q2e5t23.top/zalajara91fzn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4506200/normal_605dface3e6e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419412/normal_603c581216bee.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496816/normal_5fd03bbe339d3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373527/normal_5fcaa646dbfd8.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/d608bc4f-18d5-4cac-98ef-e833a199775c/simpson_4000_psi_pressure_washer_parts_diagram.pdfIn PDF document text
    • https://s3.amazonaws.com/zakunafu/online_converter_jpg_to.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/sabobovegelifonuvefo.pdfIn PDF document text
    • https://s3.amazonaws.com/sebunuzu/extracurricular_activities_guide_coach.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/pikowesazupip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db5d981e-a335-4cdf-8d67-fa2302ede718/rubuxizoluxegosorekizotef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6f07349-4b60-4fd9-a1a0-800c4caf86a9/corporate_social_responsibility_describes_the_firms.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_off000254b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x254B4 5224 bytes
SHA-256: 184140ac7cfea3740f9630dba4fb54aa87e7329531979355e684478e781697c2
font_01_sfnt_off00026640.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26640 13008 bytes
SHA-256: 2ce5ed3073e50b156cd200ac50e4f4a2db6bc7a6df32927736754f6f42e184c4

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