Malicious PDF — malware analysis report

Static analysis result for SHA-256 05ea4e628ea256b4…

MALICIOUS

PDF

92.7 KB Created: 2021-03-14 23:22:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: f9be012a02d46e7bf1ae2a28c1722e2d SHA-1: 4916c9d6a0a9cf03af6b362740b39d58deeb2879 SHA-256: 05ea4e628ea256b4481f2eff8d6cda288fe323204b0a4f6697586e4c3cb91417
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a machine learning classifier and ClamAV, indicating malicious intent. The document contains numerous embedded URLs, with one prominent URL appearing to be a phishing lure disguised as a search result. The presence of a link farm on disposable hosting further supports a malicious classification.

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://xajibur.ru/strik?utm_term=are+digital+tire+gauges+more+accurate PDF link annotation
    • https://cdn.sqhk.co/weteroliwo/e9fiiji/sasopipifalajebebon.pdfIn PDF document text
    • http://bonboxstudio.com/what_battery_replaces_a_lr41z50lg.pdfIn PDF document text
    • http://pokupka.space/302422012794ml40.pdfIn PDF document text
    • https://cdn.sqhk.co/vegedusovo/iayjhha/donugopapirozuzekuzedileg.pdfIn PDF document text
    • https://cdn.sqhk.co/govonesed/1giNu9p/chocolate_wedding_cake_designs.pdfIn PDF document text
    • http://vimebadu.22web.org/4824082824.pdfIn PDF document text
    • http://chategratis.online/polk_audio_12_inch_subwoofer_home_theater7b68b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457318/normal_5fedbb502e99c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482009/normal_6033f26b12106.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387919/normal_6010990fdd657.pdfIn PDF document text
    • https://cdn.sqhk.co/gawisibiw/bifHUij/buzzer_community_safety.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369645/normal_6009e7dfdf92c.pdfIn PDF document text
    • https://cdn.sqhk.co/fazejitev/2PMijpm/povafasepolibewiparim.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/varolexexus/89779121797.pdfIn PDF document text
    • https://4be8a7ba-6c9a-47a4-99fc-a5961b41a404.filesusr.com/ugd/132250_c0360b2b88f44bf2bb9f0c28ccfb86b2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/how_to_set_up_kindle_fire_for_child_uk.pdfIn PDF document text
    • http://xuloxaguxeruro.rf.gd/arduino_nano_pinout.pdfIn PDF document text
    • https://507d1b22-ea03-4061-a262-f79425337ca2.filesusr.com/ugd/a374b9_4e05bf21a0b0401a8fbc4f0e29d93832.pdf?index=trueIn PDF document text
    • http://fafetodimit.epizy.com/82213675577.pdfIn PDF document text
    • https://cb38ef3f-1f2c-4622-8962-dca261660167.filesusr.com/ugd/3ae201_da81cb2df83c41bba122b42a09998c19.pdf?index=trueIn PDF document text
    • http://mizajasidan.epizy.com/mevur.pdfIn PDF document text
    • https://5cbbff6b-7c47-4fbb-abda-9de5069fbc88.filesusr.com/ugd/1a89c8_78302e005bd74e2b938ab8fc4770d931.pdf?index=trueIn PDF document text
    • https://5ee0d2ad-6486-47ce-ab7d-0e7b2bae4193.filesusr.com/ugd/bc0d1e_3a99b0f51f284e54b0cf55c2fb8f85d2.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_off00012d4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D4B 5248 bytes
SHA-256: 5d1847b9f79d93d94823d756211a2cefef317d56b285201690067ec41ac9baeb
font_01_sfnt_off00013f0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F0E 10684 bytes
SHA-256: fda6d33b77c38a577dbf8bb1bc650352e9af95ac0212036a56cd3f344f21e82d

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