Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4604757e4fbe846…

MALICIOUS

PDF

76.2 KB Created: 2021-03-25 20:40:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 90f79eee22978d0f808c09410addef01 SHA-1: 1fc3868b94aedeb5eaa14fef35e7f248550bdf62 SHA-256: e4604757e4fbe8464d560f20ce2b1c5552cc000642d36a2c85469de09df4df6f
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a link farm, suggesting a phishing or SEO manipulation tactic. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://druttle.ru/aws?utm_term=citizen+nighthawk+wr200+set+time PDF link annotation
    • https://lurukise.weebly.com/uploads/1/3/4/4/134454795/buxemukamuf.pdfIn PDF document text
    • http://naturaitalia.space/distress_tolerance_skillsn0vz7.pdfIn PDF document text
    • https://tebobasuzojipol.weebly.com/uploads/1/3/1/4/131407082/dbc5842c0960a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370089/normal_5ffd4d5034238.pdfIn PDF document text
    • https://cdn.sqhk.co/regavebike/jL3T4uI/internet_manager_for_android_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368506/normal_60079969ae8fa.pdfIn PDF document text
    • https://cdn.sqhk.co/duponetix/6VbyiiL/dragon_quest_xi_switch_demo_length.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370063/normal_605191b74ffa6.pdfIn PDF document text
    • https://cdn.sqhk.co/sadinuko/9ig5JRT/download_mp3_music_apk_pro.pdfIn PDF document text
    • https://cdn.sqhk.co/sifolilo/jkTismz/security_company_business_plan_template.pdfIn PDF document text
    • http://sushibara.net/648321588898tjpi.pdfIn PDF document text
    • https://cdn.sqhk.co/bisegepamitu/idgjHhg/bowl_pin_strike_deluxe_3d_print.pdfIn PDF document text
    • https://pagajunudew.weebly.com/uploads/1/3/5/9/135992687/cf6ec70e43.pdfIn PDF document text
    • https://vizefibamoraxob.weebly.com/uploads/1/3/4/6/134613498/43ca8c32.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495858/normal_5ffdea9f01e64.pdfIn PDF document text
    • https://cdn.sqhk.co/pixorikibam/jejjjjB/demusowatudazotuleposogu.pdfIn PDF document text
    • http://bestpriceforukraine.xyz/pavotasetln57.pdfIn PDF document text
    • https://cdn.sqhk.co/naludibeg/hgG3gcZ/47328961855.pdfIn PDF document text
    • https://cdn.sqhk.co/lazimafuxuxi/yfpjhja/f1_mobile_racing_setup_guide.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://204833c8-abda-4421-8777-5048ee7dd919.filesusr.com/ugd/e30b7a_262744cac8234e7d8011738274fa8b13.pdf?index=trueIn PDF document text
    • https://eaa62ee9-779c-4a2d-9f50-6c66b019a99c.filesusr.com/ugd/1cc777_758e81ef8e124017b79cb416e845a39f.pdf?index=trueIn PDF document text
    • https://3ae4d138-4ba3-4962-98fb-1b98b40a6a82.filesusr.com/ugd/38062a_5e63b82f59d04e79b31f94a21576a246.pdf?index=trueIn PDF document text
    • https://27a83426-c768-4525-a63d-b5b732cca755.filesusr.com/ugd/28b3f7_231d605889164620a91299be54973a9c.pdf?index=trueIn PDF document text
    • https://1416a32c-f91c-4ec3-9c10-bfdf610c7df7.filesusr.com/ugd/76de1a_24d53556069e41a9a86874bd2297be8c.pdf?index=trueIn 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_off0000dfb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB6 5248 bytes
SHA-256: 305e45042e2e5ed162db72d18d4bcdb342f4053f950b932adcd4c3e062fe51a3
font_01_sfnt_off0000f176.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF176 10476 bytes
SHA-256: dc733b4651a340a51d5eac335aee44335b01292a79429313c6d909019e2b466f
font_02_sfnt_off00011562.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11562 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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