Malicious PDF — malware analysis report

Static analysis result for SHA-256 14601a95da9b4620…

MALICIOUS

PDF

76.2 KB Created: 2021-03-19 23:04:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: b73c0da61c0bba1f2911bc0fe0820340 SHA-1: 119805584cbc3a718396b3dcdc94c3b69101fa6f SHA-256: 14601a95da9b462059e822d5c550977d2b7d7f580ce46c8b674ee241d5f6e7dc
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing lure. The primary URL, https://baarspo.ru/strik?utm_term=how+to+connect+plantronics+cs530+to+computer, is likely part of a campaign to redirect users to malicious content. No scripts were extracted, but the PDF structure and link farm heuristics indicate a malicious intent to drive traffic to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://baarspo.ru/strik?utm_term=how+to+connect+plantronics+cs530+to+computer PDF link annotation
    • https://cdn.sqhk.co/fiwujumejuf/hgijNhh/spellbinders_coupon_code.pdfIn PDF document text
    • https://baputopozim.weebly.com/uploads/1/3/5/3/135336161/dajeraxemano-dizelito-biwasulefuk.pdfIn PDF document text
    • https://cdn.sqhk.co/kakapoxavu/iWAbje0/68936986595.pdfIn PDF document text
    • https://cdn.sqhk.co/kiribikiv/Fgg8L75/xetevunonolufeguz.pdfIn PDF document text
    • https://wekowemawifov.weebly.com/uploads/1/3/4/2/134266616/ee63d564173bc.pdfIn PDF document text
    • https://cdn.sqhk.co/fonazovep/z3jhge3/air_hockey_tournament_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/vasozaponem/uihD2jc/minecraft_pocket_edition_online_free_game.pdfIn PDF document text
    • https://jotigigej.weebly.com/uploads/1/3/0/7/130739509/26285a.pdfIn PDF document text
    • https://dimafivatoputir.weebly.com/uploads/1/3/4/4/134496040/jajupepetugub-jekuxebe.pdfIn PDF document text
    • https://cdn.sqhk.co/jivonaxadu/Bgd56Am/vazuzugewava.pdfIn PDF document text
    • https://fasuwilobavofe.weebly.com/uploads/1/3/4/4/134489762/tinedoxuk.pdfIn PDF document text
    • https://cdn.sqhk.co/supetuzitepi/SLsN3mT/jepilulepejixipawexok.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/a9f3595b-4e1b-4f2f-a86b-074627da34c7/jbl_xtreme_2_review_techradar.pdfIn PDF document text
    • https://s3.amazonaws.com/fuvidokibet/44806294919.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc2b18ef-2ecd-47b6-b867-bf29b7649d4e/jikilisureriki.pdfIn PDF document text
    • https://97d49ff2-d914-4ae4-8ac8-5e5cf5f77cad.filesusr.com/ugd/6350c7_1ce284b135504f9b93aad3ac6edd1c74.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pexodugosa/spotify_premium_free_apk_latest.pdfIn PDF document text
    • https://5071cc05-3fa2-46b1-b944-d2523ca4b51d.filesusr.com/ugd/62e2c1_ad755f9c992f4daa97d074b276b0c060.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jedadokuti/what_is_feminist_sociological_theory.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1542e1ea-5d62-4621-901b-81af1f01ef9b/800_words_series_1_episode_6.pdfIn PDF document text
    • https://438e95ed-c264-4db5-88d3-1a9ca8b91b86.filesusr.com/ugd/733c1f_864790572a0342548f86d657daf0cc83.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9473f8d-cb44-4422-b52b-5a97c2180dfb/wujovokapikidefapetabirum.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_off0000ed35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED35 5560 bytes
SHA-256: 5f7e17bc67a85ffc5ed191e53d20d87add327ec720c532bca844c4b1193c78b7
font_01_sfnt_off0001001c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1001C 10220 bytes
SHA-256: d0f796f9af6bf56acea3cd7b11be74e42221ab30aadfb43c9e791a7b7a3a5934