Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d4abc9e09cf0a1d…

MALICIOUS

PDF

64.3 KB Created: 2021-02-22 01:59:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 37a2d3875c42ffc24090d6a96c33e044 SHA-1: 870e86d218be83c80a8715efd0811f3890f3213c SHA-256: 8d4abc9e09cf0a1dcc9ab4504f6e0907144e3800d8e966374c30571c7c8a86a8
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to unknown or potentially malicious domains, as indicated by the 'PDF_SEO_LINK_FARM' and 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristics. The ML classifier and ClamAV detection further support its malicious nature. While no scripts were explicitly extracted, the structure suggests an attempt to redirect users to malicious infrastructure, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wix?keyword=mpow+flame+manual In PDF document text
    • http://petrol-v-pol-price.site/english_textbook_for_grade_7qxfde.pdfIn PDF document text
    • https://bogezemobazuv.weebly.com/uploads/1/3/1/8/131856224/kexozugubigeri.pdfIn PDF document text
    • http://cpskras.website/denosefadipunibynvwq.pdfIn PDF document text
    • http://detonic-official.website/talking_panda_apknareo.pdfIn PDF document text
    • https://cdn.sqhk.co/wisaputal/1hc1ggY/mizojabelejiritoradujatil.pdfIn PDF document text
    • https://maxolesaso.weebly.com/uploads/1/3/0/7/130776327/lujijo_rowakosuloziro_lejajafinowudat_rosovagewotifen.pdfIn PDF document text
    • http://look-hotel.com/122231090976qcxw.pdfIn PDF document text
    • https://cdn.sqhk.co/rapowipijes/hjJrhga/cowboy_caviar_paula_deen.pdfIn PDF document text
    • https://cdn.sqhk.co/sulojumi/hpggShd/download_real_football_2016_with_real_player_names.pdfIn PDF document text
    • http://easylearning.space/matriz_de_analisis_fodazspfq.pdfIn PDF document text
    • https://dusimajigedavim.weebly.com/uploads/1/3/1/4/131453199/bevujapebutejezojad.pdfIn PDF document text
    • https://cdn.sqhk.co/mozedizupi/nqhighb/69778560665.pdfIn PDF document text
    • https://limofagis.weebly.com/uploads/1/3/4/6/134640762/gotokavakigawek.pdfIn PDF document text
    • http://yourbigdick.space/98097744033y4z9r.pdfIn PDF document text
    • http://muzhskoizhurnal.ru/roblox_cops_and_robbersforos.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/vobuturinivi/antibiotic_prophylaxis_guidelines_hip_replacement.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/the_celts_civ_5_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/shareit_app_2018_jio_phone.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/lofiwirad.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/krk_rokit_5_pair_with_stands.pdfIn PDF document text
    • https://s3.amazonaws.com/sewamos/xezezetetotuj.pdfIn PDF document text
    • https://s3.amazonaws.com/tojabixefova/brahma_vaivarta_purana_english.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/secured_promissory_note_template_florida.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_off0000c150.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC150 4872 bytes
SHA-256: f7c404acdc14fcc11d93f73d2cfb062d636148966853f652c772b311b558fecb
font_01_sfnt_off0000d1f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1F3 9808 bytes
SHA-256: 5b454c64befe5160ac538a1d7d8131224f951829fe2403b41d9596b20e84acbc

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