Malicious PDF — malware analysis report

Static analysis result for SHA-256 090b903fb7a907f1…

MALICIOUS

PDF

69.6 KB Created: 2021-03-07 04:38:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: abf128b305a8e0b3c5fb2a9069cdbd0c SHA-1: b9d4eba723cdee919f3017c31a28da6a007d8c69 SHA-256: 090b903fb7a907f131e9f0edbc72c4ffcc8052bbb8f12814b721f5dd017964ae
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ML and ClamAV, indicating malicious content. It contains numerous embedded URLs pointing to disposable domains and link farms, suggesting a phishing or malware distribution scheme. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a deliberate attempt to create a large number of links on low-reputation hosting, likely to funnel traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://gimoguvi.ru/wix?keyword=sloppy+stage+2+camshaft+summit PDF link annotation
    • http://puviwaxeraw.22web.org/sujujopewamexisono.pdfIn PDF document text
    • https://cdn.sqhk.co/nupepewomaxu/gwOgivf/traffic_rider_hack_version_apk_download_ios.pdfIn PDF document text
    • http://poxedon.22web.org/what_happened_in_the_theory_of_evolution_state.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381340/normal_602feb65b145b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485001/normal_601ef216effc7.pdfIn PDF document text
    • http://fanogizakelime.iblogger.org/49575671629.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502178/normal_5fe57347ee6b4.pdfIn PDF document text
    • https://cdn.sqhk.co/sufiwotag/WgifO3t/74867833490.pdfIn PDF document text
    • http://godulonu.22web.org/germanium_facts_sheet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450351/normal_5fcaec6ba66d1.pdfIn PDF document text
    • http://zajegipu.22web.org/99160395122.pdfIn PDF document text
    • https://cdn.sqhk.co/rejibebadit/fichehb/67077332214.pdfIn PDF document text
    • https://cdn.sqhk.co/zojisixu/jehfygh/bright_memory_mobile_v1._01_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/wuluzajiroz/jbidS8M/escape_girl_room_level_7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/rizezobabub/cavernous_transformation_porta_hepatis_ultrasound.pdfIn PDF document text
    • https://s3.amazonaws.com/zafibimutadoti/is_go_ask_alice_fiction.pdfIn PDF document text
    • http://jusakurufawotol.rf.gd/napaxobon.pdfIn PDF document text
    • https://s3.amazonaws.com/lomuper/86206880631.pdfIn PDF document text
    • http://nafovivejaza.epizy.com/2011_chevy_traverse_oil_type_and_capacity.pdfIn PDF document text
    • http://gisujok.epizy.com/rekavanolada.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c62d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC62D 5444 bytes
SHA-256: 561761fc3a6d76b5aee56be33e3d6ffb492fbf06d20fc230fa9db41d711967a6
font_01_sfnt_off0000d8c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C9 10088 bytes
SHA-256: cb24ec5b8c10ce7d6cee5580dfe2aba7a46da3408eb26028dbda6bc36955700d
font_02_sfnt_off0000fb1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB1F 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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