Malicious PDF — malware analysis report

Static analysis result for SHA-256 b76a03668ab24143…

MALICIOUS

PDF

69.8 KB Created: 2021-03-04 10:08:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: a614a6a823905feb72afb889794a0901 SHA-1: 72c0caf2e603a0cd4eed06b111d00e7315feafc0 SHA-256: b76a03668ab24143e7205bd8e10292628dd414872ff4de2e2074f7f808934e38
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://dafemum.ru/award?keyword=dymo+letratag+tape+refill In PDF document text
    • https://sukaxivex.weebly.com/uploads/1/3/4/8/134895869/nexavaderetide.pdfIn PDF document text
    • http://zikapipumimapo.22web.org/71229408484.pdfIn PDF document text
    • https://kirobobu.weebly.com/uploads/1/3/4/5/134593563/berawunamizozik_temaxazovili_besoxoto.pdfIn PDF document text
    • https://dudakodut.weebly.com/uploads/1/3/4/4/134497067/dalorosoferix_fitoze.pdfIn PDF document text
    • https://cdn.sqhk.co/pelebitebi/gfjapid/zivabitasararak.pdfIn PDF document text
    • http://trastqort.online/janapada_kannada_song_freeiq6aq.pdfIn PDF document text
    • https://cdn.sqhk.co/jigijobofofa/hjhVqji/zezipimejadavotogakijeku.pdfIn PDF document text
    • https://cdn.sqhk.co/vufisolepu/gfgfeL1/nerobakixakinadiru.pdfIn PDF document text
    • http://bluebadgeapproval.com/past_simple_exercises_multiple_choictls0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478393/normal_6010aa9d2ca19.pdfIn PDF document text
    • http://lovelyhouse.online/64485691527j7gu4.pdfIn PDF document text
    • https://cdn.sqhk.co/wemopizajazo/YghrEid/6557167134.pdfIn PDF document text
    • https://cdn.sqhk.co/sokaxopoje/HfghDp6/street_fighter_hangar_backpack_trophy.pdfIn PDF document text
    • https://karujelibofab.weebly.com/uploads/1/3/1/4/131406149/sexuzaviga_jikudifu.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/jivagajamav/algebra_2_answers.pdfIn PDF document text
    • http://rivebop.epizy.com/chitrangada_bengali_full_movie_hd.pdfIn PDF document text
    • http://rupegofiminatef.epizy.com/schnucks_bratwurst_nutrition_information.pdfIn PDF document text
    • http://sedejavuguz.rf.gd/aradhana_film_ke_gane.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_off0000d2b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2B5 5144 bytes
SHA-256: 4020e82eb5f584a14d366b1143c2fe6f4b1d521d36065d27a5ff4bfecfddd1ba
font_01_sfnt_off0000e434.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE434 10720 bytes
SHA-256: e363ad40c314b4a3df5ee5e4fcc59c5818fdd6444916767bef637c0074b0240a

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