Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a6fb4f4d17ed531…

MALICIOUS

PDF

72.3 KB Created: 2021-02-28 11:33:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 27180aacef479190769227c9f09e39d6 SHA-1: 8158b40ae5f39c9d4c165164ad5a292b139ce142 SHA-256: 8a6fb4f4d17ed531f44a457b9c2f7f35feefc556bf725fbe2df4e830dd389678
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://yafferge.ru/wix?keyword=heating+curve+worksheet+honors+chemistry+answers In PDF document text
    • https://lekemevegov.weebly.com/uploads/1/3/1/4/131410090/0d26a8.pdfIn PDF document text
    • https://cdn.sqhk.co/pepegejivo/ZicNjcm/us_history_trivia_quiz_test_your_knowledge_answers.pdfIn PDF document text
    • https://wujibinofowe.weebly.com/uploads/1/3/1/3/131383737/fufawofuzotufu_nagoko_jubejug.pdfIn PDF document text
    • https://cdn.sqhk.co/wazuzofi/ighigib/how_to_cook_premade_spaghetti_squash_noodles.pdfIn PDF document text
    • https://tipowunukal.weebly.com/uploads/1/3/4/3/134355136/zosifisoxezeweve.pdfIn PDF document text
    • http://kanaxade.mygamesonline.org/gutexewu.pdfIn PDF document text
    • https://linowatudevenur.weebly.com/uploads/1/3/4/5/134599813/ponividerujo_ribitip_tabekudomoruxar_kogufufovazofep.pdfIn PDF document text
    • https://dijajogid.weebly.com/uploads/1/3/0/8/130874349/vozoridafubusa.pdfIn PDF document text
    • https://cdn.sqhk.co/zanivuwiduvo/icxhfhd/battle_craft_survival_apk_download_uptodown.pdfIn PDF document text
    • https://dowazulipogopu.weebly.com/uploads/1/3/4/3/134322731/vabuwedoxapanekamas.pdfIn PDF document text
    • https://kesoxebexug.weebly.com/uploads/1/3/2/6/132681937/c245a222eb8991.pdfIn PDF document text
    • https://cdn.sqhk.co/dowusutitozi/jajhrhx/friends_international_uk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459174/normal_5ff4fb1b2b4e2.pdfIn PDF document text
    • https://xavaruren.weebly.com/uploads/1/3/1/3/131383751/0d300fe7efe7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xemunebo.atwebpages.com/how_to_learn_physics_on_your_own_reddit.pdfIn PDF document text
    • http://belukamafanes.rf.gd/voltaire_candide_esky.pdfIn PDF document text
    • http://pevipitoz.atwebpages.com/vorojavozusilerozoxenegiz.pdfIn PDF document text
    • http://lirurija.rf.gd/zefunugejasitoderufesuw.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_off0000ddfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDFC 5460 bytes
SHA-256: 9bfacd655123d4ebd54b1cde37117c72424e81764428067dcfefb16f40dac57c
font_01_sfnt_off0000f082.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF082 10396 bytes
SHA-256: f18827aa4a458257b07bf6375805005ad76cdfa018d16aec4f763345502886da

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