Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bc2f9c7745b719e…

MALICIOUS

PDF

79.3 KB Created: 2021-05-06 10:24:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: c78242d6b8112f549ca991dd6c65c984 SHA-1: 98789eb9a8a4a8251944e589be14ac65ca5b9304 SHA-256: 4bc2f9c7745b719e4d22e276280acccfe31d649553744243514df06c05334059
126 Risk Score

Malware Insights

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

The PDF contains multiple external URIs, with one specifically targeting 'jitterbug+phone+battery+life' and redirecting through a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to lead the user to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://druttle.ru/strik?utm_term=jitterbug+phone+battery+life PDF link annotation
    • https://cdn.sqhk.co/fofotixoz/dGjhicA/lolibuwogikuvid.pdfIn PDF document text
    • http://bujenaro.scienceontheweb.net/pivazusid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383295/normal_605a500bf0762.pdfIn PDF document text
    • https://cdn.sqhk.co/sojowidaz/qjhpPV9/dhoom_machale_english_version_lyrics.pdfIn PDF document text
    • http://vufiwopader.medianewsonline.com/bugivipexomeposaporun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497095/normal_604661ba0a851.pdfIn PDF document text
    • http://jotitojimo.mygamesonline.org/pompeii_buried_alive.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408321/normal_5febc46070cde.pdfIn PDF document text
    • http://vakiduweg.mygamesonline.org/wijeloxonufu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483867/normal_5ffdf12c5e36d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445541/normal_6044fe88e7f92.pdfIn PDF document text
    • https://cdn.sqhk.co/budafitanu/jhiecja/sereko.pdfIn PDF document text
    • https://cdn.sqhk.co/govovazeket/hddGgfl/51775926897.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/mijumomub/5637052765.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/direct_and_indirect_objects_worksheets_spanish.pdfIn PDF document text
    • https://e7f45dcf-1957-410e-85b1-216e85a225c4.filesusr.com/ugd/a2c2bc_b8a7fab8e38c4113bc0db15d2c80c305.pdf?index=trueIn PDF document text
    • https://0503187d-52cd-4237-9521-a3cb9bf551ae.filesusr.com/ugd/5bb01c_5f40e74169774806895ba6863ecbee52.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jonora/horizontes_script_gratis.pdfIn PDF document text
    • https://c7e723d0-7712-45a3-a8dd-8d8935e7c5e2.filesusr.com/ugd/c4f451_c7095509760c4887acc6aa6dfbcb6a86.pdf?index=trueIn PDF document text
    • http://paguxesij.myartsonline.com/54878627575.pdfIn PDF document text
    • http://kapirexazi.onlinewebshop.net/vexodozilo.pdfIn PDF document text
    • http://gajutar.onlinewebshop.net/sanborn_magna_force_air_compressor_5hp_parts.pdfIn PDF document text
    • https://354df738-7a8c-4643-bdcd-aa58f7c4bd0c.filesusr.com/ugd/69cf62_25c64bcb36194d7598cc66277d3c58ca.pdf?index=trueIn 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_off0000f82a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF82A 5216 bytes
SHA-256: 70d45c51a004d88162ade4b9ce3e4beea6399bba28aff9a6d5b94ceefb501f4b
font_01_sfnt_off000109f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109F0 11192 bytes
SHA-256: 8a20a5a7092fe6cd7a58144fcaf3986cf501b8b3a040f814c8dd647ca2a0fe0c

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