Malicious PDF — malware analysis report

Static analysis result for SHA-256 4834055ac2e2d708…

MALICIOUS

PDF

75.9 KB Created: 2021-03-13 19:16:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 71ab78e88eba083be8ffaee73b43c99b SHA-1: bbf98fa302999c4c60b70856340e0917c48ed2c4 SHA-256: 4834055ac2e2d708d295f47891566cf883049542a4b31c28081149133339fbb2
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains multiple embedded URLs pointing to suspicious domains, including one that appears to be a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. The document body, though partially corrupted, suggests a lure related to 'journeyman electrician' to entice users to click on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jottigo.ru/strik?utm_term=how+to+be+journeyman+electrician PDF link annotation
    • http://rokukugopo.22web.org/tirenemog.pdfIn PDF document text
    • http://bepelisufozasep.mywebcommunity.org/mufebadinunitusisem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387060/normal_5feaf05f06e44.pdfIn PDF document text
    • http://wivikaxebox.medianewsonline.com/how_to_charge_ion_sport_speaker.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388412/normal_603a14ca0ff27.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366668/normal_5ffc2f251d546.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368951/normal_60388eb8b41c4.pdfIn PDF document text
    • http://vobonenagixavus.66ghz.com/wejajadakazobawedoloveti.pdfIn PDF document text
    • http://turiwovezaz.iblogger.org/national_geodetic_survey_data_sheets.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468572/normal_60044c76880d1.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/ba67908c-7b79-4307-9ecc-9d7cf375662b/merer.pdfIn PDF document text
    • https://30621b86-6952-4b41-80af-4d24d830bc7c.filesusr.com/ugd/122077_68688455574344318f29c35916ae01ed.pdf?index=trueIn PDF document text
    • https://1a2149e7-ca7f-4e7c-a584-0e483de6f3af.filesusr.com/ugd/9219f8_be32b1d423d7450db5fba2fc6891b0bb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ac368d1-2891-4d30-8fcb-c0852eebc584/zabapeliw.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/briggs_and_stratton_2800_psi_pressure_washer_oil_type.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e3e2b66-65b4-4b48-98e5-d16b520bddc2/gatozukelogamubaji.pdfIn PDF document text
    • https://8c285b57-3156-47ce-881b-df665acc117b.filesusr.com/ugd/8d46c2_6f26c113b0e1436a8b399b06159f03f6.pdf?index=trueIn PDF document text
    • http://jasesazolaf.myartsonline.com/sogorol.pdfIn PDF document text
    • https://s3.amazonaws.com/zamemigojat/todupetuputurewufejevad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/746097da-12bd-4aa2-bc96-4682541f190f/sigepojelosinoba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1df27da3-f12d-4e65-b61f-c9dd635480b9/dawizivokijuxajuxit.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB30 5136 bytes
SHA-256: b180f5ff2c4497f3bc972f91f07da8767656884201c23cc0816c880317fb752e
font_01_sfnt_off0000fcab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCAB 11172 bytes
SHA-256: 7155c5ec0b3066cfc7ba036f9db961a4ea655c013356ef6ceda3e749d19f00eb

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