Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bb601be3513b0da…

MALICIOUS

PDF

76.4 KB Created: 2021-04-23 08:07:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 2ee4fd42a0df5dce0b684296ec09d457 SHA-1: a06ed363a2f25748c86459a9e9e14d2221c7d2fa SHA-256: 5bb601be3513b0da8e3bcc317eb32595cfe1b6ba1993a3980ad5d7d7ea28c1b1
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jumiwimov.ru/strik?utm_term=agatha+christie+film+miss+marple PDF link annotation
    • https://cdn.sqhk.co/rapurakoke/hggdRjb/xadasafalenakobujovopebap.pdfIn PDF document text
    • https://cdn.sqhk.co/kisoxukapab/c1Ejhhh/20212578468.pdfIn PDF document text
    • https://cdn.sqhk.co/xovenekot/8GglEgh/757447952.pdfIn PDF document text
    • http://jibinaxinolano.iblogger.org/how_to_use_hype_wireless_earbuds.pdfIn PDF document text
    • http://sugujob.22web.org/kukupukogalij.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8f6f9f04-f977-4239-955d-f6aecf2dd879.filesusr.com/ugd/81cd61_48427acc149940b493df5e575a606dde.pdf?index=trueIn PDF document text
    • http://nibudikugi.epizy.com/8941988314.pdfIn PDF document text
    • http://denotepisijolib.rf.gd/36587689332.pdfIn PDF document text
    • http://serozefa.epizy.com/lupakagojamon.pdfIn PDF document text
    • http://dovanudoku.rf.gd/mavepotirofurugabo.pdfIn PDF document text
    • https://599b09cd-7b6a-4758-94a3-08a08d316165.filesusr.com/ugd/628a76_7cefe0a71b63420d8e6aade2855f5cc9.pdf?index=trueIn PDF document text
    • https://b1f0a730-f0e4-4bcf-918d-a915077b90d0.filesusr.com/ugd/a7c69d_0c6ef5026dac45348f3501015747254a.pdf?index=trueIn PDF document text
    • http://fobowolim.rf.gd/brittani_louise_taylor.pdfIn PDF document text
    • http://fogaweja.epizy.com/kuvitixil.pdfIn PDF document text
    • https://c24d0846-efa5-4754-a822-a7dc8f88f2d4.filesusr.com/ugd/7b2abd_7d470ea4b78444568fc9e4c68ad64ee2.pdf?index=trueIn PDF document text
    • https://98748e4b-3258-471a-903e-8ea98415cca0.filesusr.com/ugd/fd7405_c613e41f030a47058068ab9ac7e2b69c.pdf?index=trueIn PDF document text
    • https://7ae52be2-ba3c-41fb-8935-29281088223e.filesusr.com/ugd/affaa6_4527dd4fbcc54e459f2b4ef315db8686.pdf?index=trueIn PDF document text
    • http://rufeluvogoweva.epizy.com/ielts_writing_task_1_sample_answer_band_7.pdfIn PDF document text
    • http://gojemivul.epizy.com/imo_guidelines_enclosed_space_entry.pdfIn PDF document text
    • https://b5b764bc-4fc6-48d7-9a4b-423a4d05f225.filesusr.com/ugd/3f2390_15c10d51133943e9bcf8ca1267bc67d0.pdf?index=trueIn PDF document text
    • https://8319d365-0190-44ee-b2f3-e76f6fd230eb.filesusr.com/ugd/112488_62edf0dbd42c442784c1e2ece6de9f4d.pdf?index=trueIn PDF document text
    • http://pewavifasovifuz.epizy.com/71516135109.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_off0000edbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDBD 5420 bytes
SHA-256: a2ece34d4d1990a1a3b02d2ffd1c827ab8f7927cec6e84c82c2b9d54ed9feb87
font_01_sfnt_off00010008.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10008 10528 bytes
SHA-256: 0b424de55e822f9d71fdf7c610c50655675990ae85ce046cafa5dc7064f4aeee