Malicious PDF — malware analysis report

Static analysis result for SHA-256 969a6c627398c202…

MALICIOUS

PDF

97.9 KB Created: 2021-02-08 08:59:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 6cdd9f7a41bb651717b8eba83ab8ab78 SHA-1: 8c213b314d695334fc88e9b7b43fd7d3c3f776d0 SHA-256: 969a6c627398c202506e23cd60b0eb2d3f7d4556c3796577276f958d2bc77c39
126 Risk Score

Malware Insights

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

The sample was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm on disposable hosting. It contains numerous external URIs, including one pointing to 'baarspo.ru', suggesting an attempt to redirect users to potentially harmful content. No scripts were extracted, but the PDF structure and embedded URLs indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/aws?utm_term=aerobics+bollywood+songs+free PDF link annotation
    • https://cdn.sqhk.co/pabulibig/R83rhcF/pokemon_cards_value_tcg.pdfIn PDF document text
    • http://beveram.66ghz.com/ravalepopodilujerajazup.pdfIn PDF document text
    • http://jegewuzewan.iblogger.org/50255193850.pdfIn PDF document text
    • https://cdn.sqhk.co/zisubiziwu/egfVxnl/brake_shops_near_me_open_now.pdfIn PDF document text
    • https://cdn.sqhk.co/luwiwaduna/aXgghfz/14094736069.pdfIn PDF document text
    • https://cdn.sqhk.co/dibitarebizu/cElShi7/fall_school_start_date_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/jomonufo/cHULZ9h/air_control_tower_for_sale_wellington.pdfIn PDF document text
    • http://melifalafijuz.22web.org/tominug.pdfIn PDF document text
    • https://cdn.sqhk.co/bebomopakax/rpDRLji/best_videocon_d2h_recharge_offers.pdfIn PDF document text
    • https://cdn.sqhk.co/pubamegumox/if1aheQ/survival_planet_anime.pdfIn PDF document text
    • https://cdn.sqhk.co/wudenedu/SidJQAr/38554360209.pdfIn PDF document text
    • http://sosunimepewe.22web.org/milowijugabewuwita.pdfIn PDF document text
    • https://cdn.sqhk.co/demejapad/Zicicgh/wunonelipirewow.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/gotenukevepunin/format_to_2_decimal_places_php.pdfIn PDF document text
    • http://jofesosozofoso.epizy.com/misolurirujamuruvu.pdfIn PDF document text
    • http://takugiwem.rf.gd/biperi.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/50915795235.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_off00014057.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14057 5304 bytes
SHA-256: ef5eb297bf794d4e25178eef425d680c36511b4a16bab0bebca898ba900ea0c0
font_01_sfnt_off0001528c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1528C 12476 bytes
SHA-256: 4365f263ebce839c593e5a4b0ad35230c403665e293fa451f19cf6ddf44c5ac5

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