PDF malware analysis — malicious · 4e5cf7b8604f622d

MALICIOUS

PDF

67.3 KB Created: 2021-03-05 13:57:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17

MD5: b87411fe574f3b15161cd370f4aae214 SHA-1: 86b1a25e6a13b54b9275c5743f16006bcc909619 SHA-256: 4e5cf7b8604f622d8b44585f3dab32aff5377deb3e7048fd0e400d588fbd9d2d

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'zajinet.ru', which is likely part of a phishing or scam campaign. The document body, though heavily obfuscated, appears to contain metadata related to its generation by wkhtmltopdf, suggesting it was programmatically created to host the malicious link.

Machine Learning

Nyx PDF Classifier malicious score 0.9992

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://zajinet.ru/wb?keyword=what%20is%20the%20best%20beginners%20harmonica PDF link annotation
- http://cosmicgig.com/3374171059k9ru2.pdfIn PDF document text
- http://gigurokubi.66ghz.com/babatusaxisaz.pdfIn PDF document text
- http://sexurinugu.22web.org/suwobivatonik.pdfIn PDF document text
- https://cdn.sqhk.co/sibamoxa/04Njjia/37562806690.pdfIn PDF document text
- http://fesuzeroba.iblogger.org/annamalai_university_dde_prospectus_2017.pdfIn PDF document text
- https://cdn.sqhk.co/bitomasijelo/ijydieN/jopisimem.pdfIn PDF document text
- https://cdn.sqhk.co/jelivapizivo/jhiKnSg/kijeremugaz.pdfIn PDF document text
- https://cdn.sqhk.co/dubutemaruxu/gcDidhi/13454379897.pdfIn PDF document text
- http://cosmicgig.com/73694057457ki4cy.pdfIn PDF document text
- http://tdsevsvet.ru/probability_distribution_questions_and_answers4pj07.pdfIn PDF document text
- http://lovemecompletely.com/vadozexavixodapuki316a8.pdfIn PDF document text
- https://cdn.sqhk.co/susojareb/w7degdy/download_game_ninja_fishing_mod_apk.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/2a347381-9fe1-464f-9d2a-b5d9e72d74ea/53836199240.pdfIn PDF document text
- https://s3.amazonaws.com/gajabedafot/job_application_form_sample_malaysia.pdfIn PDF document text
- http://dolizanawuw.epizy.com/kinejijowawurusipulodefof.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/c36852fc-52b1-46c0-b0ac-65e698961d40/favukuvotaja.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/02a77732-5a38-4da1-b01a-7e345493cc09/mecnica_vectorial_para_ingenieros_esttica_10_edicin_espaol.pdfIn PDF document text
- https://s3.amazonaws.com/wipotegadodorek/budget_bid_template_nz.pdfIn PDF document text
- https://b67fa923-03b4-4d21-b555-95ff628d7525.filesusr.com/ugd/1d4b90_927bd39c9d6d416885d26b6ff6a11b3a.pdf?index=trueIn PDF document text
- http://nodefojabotozij.rf.gd/hiwin_linear_guide_catalogue.pdfIn PDF document text
- https://528a8416-53f4-4693-bcf0-540471887af1.filesusr.com/ugd/c3aa89_ad9b9dc25ef341e4a2d721f9e44c430c.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/napoledunadigo/employment_contract_amendment_template_word.pdfIn PDF document text
- https://ec679cc6-872a-45a8-b2fd-b1bc8f6ddb77.filesusr.com/ugd/d1d005_c33092ea1292423eb9638eeec734eb0e.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/gopuze/gosuwemifilekurogofi.pdfIn PDF document text
- https://24218389-b518-4ca3-8548-65eaf758daa4.filesusr.com/ugd/c836c3_16d503d5848942fab5c1a7ea931dd392.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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000cc6f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCC6F	5336 bytes
SHA-256: `2cc2c865f3cd48d33501a111f4d5a24ee89da674e9ebc90b400a6723a3615f6e`
`font_01_sfnt_off0000de7b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDE7B	9916 bytes
SHA-256: `86ddb5da7f7b7b3aff5f381594fdaf0d63c5ea6fa6b637a4486c6c2ceea3a60b`

Open this report in the interactive analyzer, or submit your own file for analysis.