Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c004b5d36536f50…

MALICIOUS

PDF

86.2 KB Created: 2021-02-14 12:08:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 2a77403322d822fe4b4a05aca7a6dfa2 SHA-1: 95af2ece732bf2f218bbe0600d74e3cf0abacd45 SHA-256: 0c004b5d36536f50a348252afafcd741336143f2cf32a5d53e9104eefe05bd28
244 Risk Score

Malware Insights

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

The PDF contains a large number of links to external resources, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure. The ClamAV detection and ML classifier further support its malicious nature, likely as a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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
  • 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.
  • 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.
  • 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=how+to+summon+bosses+in+ark+cheat In PDF document text
    • https://cdn.sqhk.co/fofesali/ghgjucH/ball_blaster_online.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366036/normal_600c672d1fec4.pdfIn PDF document text
    • https://cdn.sqhk.co/toxinize/h6jgghg/45921554805.pdfIn PDF document text
    • https://cdn.sqhk.co/rexadiwixox/jimhghb/33352343312.pdfIn PDF document text
    • https://cdn.sqhk.co/fukefipemuw/zVLiahg/bein_sports_subscribe_uk.pdfIn PDF document text
    • http://wozutujetotox.iblogger.org/canon_mg3022_setup.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403565/normal_5ff77a7bec4e5.pdfIn PDF document text
    • https://xedowekogo.weebly.com/uploads/1/3/4/6/134609622/rusili.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413007/normal_5ff75f26a6381.pdfIn PDF document text
    • https://cdn.sqhk.co/xagaxubibiz/cibEJcn/zara_online_shopping_uk_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/zowonefaso/icsjgy5/college_basketball_coaches_ranked_by_wins.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453528/normal_5fe7d15d40e84.pdfIn PDF document text
    • https://vusuranozaxo.weebly.com/uploads/1/3/4/0/134012668/serezalitugeke-keromena-taguvuguz-lobuxorisilupu.pdfIn PDF document text
    • https://cdn.sqhk.co/ligumorik/h7QCKUH/sudoku_solver_online_6x6.pdfIn PDF document text
    • https://pugiputofal.weebly.com/uploads/1/3/4/7/134740318/sexazerejelasufasa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417648/normal_5fe57c8b0639c.pdfIn PDF document text
    • http://zikifogomi.22web.org/acta_constitutiva_de_una_asociacion_civil.pdfIn PDF document text
    • https://cdn.sqhk.co/numokafas/36jfuIO/dwayne_haskins_girlfriend_cell_phone.pdfIn PDF document text
    • https://cdn.sqhk.co/gebemiwisero/AijwZgg/47502239344.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496170/normal_6009ce9fb6917.pdfIn PDF document text
    • https://cdn.sqhk.co/futogifoku/jj3hdie/puppet_ice_hockey_pond_head_mod_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gedanenek.epizy.com/toviripapomuvuvodezas.pdfIn PDF document text
    • http://kosabimelubaj.epizy.com/dopazeludo.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e12b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE12B 6588 bytes
SHA-256: c6acebe3750ab55c09714fa1b34f6c70ddae3ce202e1a088ffcbc34adab53285
font_01_sfnt_off0000f1a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A5 5264 bytes
SHA-256: 3155f0cb2580e6c96c41ba76b0c0f08772c99f502c3f685b58aafcab4e046293
font_02_sfnt_off00010366.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10366 3008 bytes
SHA-256: a191dc7ceb87e0a7ad7e530fef46a6c47b7f2706918617c6564f43e8b147d1b5
font_03_sfnt_off00011021.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11021 10216 bytes
SHA-256: ed64183b2ef69d2b230e96e7504104326b80e8779f0b679a110fd6fb5350fedc
font_04_sfnt_off00013351.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13351 16756 bytes
SHA-256: 647af756be37199c9ed3ad584ac0e98ec36cbeb6a4b77d41b3dbd28653e1a8a4

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