Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e7f0d354e054b91…

MALICIOUS

PDF

70.7 KB Created: 2021-02-24 13:12:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 0c1a460f16319564356a0dbae3ba1086 SHA-1: a5c5191cef6f827e219e888fbaecdc0fa15bce9e SHA-256: 3e7f0d354e054b91c0f2fd59f6d5ec9f2739512417d5f31bcaf18b84e7dfe2a1
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jottigo.ru/wix?keyword=central+angles+and+inscribed+angles+worksheet+answer+key+letspracticegeometry PDF link annotation
    • https://denudosija.weebly.com/uploads/1/3/4/0/134017010/luben.pdfIn PDF document text
    • https://cdn.sqhk.co/mojupesonon/ndkhhcc/coco_ice_princess_game_download_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/gizukakom/qZjeQhd/off_road_army_truck_mod_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/nomelafu/hfjiyig/63754609676.pdfIn PDF document text
    • https://saxunada.weebly.com/uploads/1/3/4/8/134865385/e7bd4a94ea1e.pdfIn PDF document text
    • https://cdn.sqhk.co/sikudile/fthdnyq/65773762589.pdfIn PDF document text
    • https://salizobujexi.weebly.com/uploads/1/3/5/3/135325558/cdabe78ba111.pdfIn PDF document text
    • https://rezodipegizosif.weebly.com/uploads/1/3/1/6/131606434/tobit.pdfIn PDF document text
    • https://vigegenatiborig.weebly.com/uploads/1/3/0/7/130740049/3374295.pdfIn PDF document text
    • http://jelesanu.iblogger.org/polytechnic_electrical_engineering_books_1st_year.pdfIn PDF document text
    • http://xemepuvaxeliv.iblogger.org/befumilidalewe.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/tazopaju/how_s_it_going_yahoo_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/xefejevife/answer_my_question.pdfIn PDF document text
    • http://gavasirobodi.rf.gd/99285153494.pdfIn PDF document text
    • https://s3.amazonaws.com/fedojigudaj/letter_from_birmingham_jail_assessment_answers.pdfIn PDF document text
    • http://potimafekun.epizy.com/735432399.pdfIn PDF document text
    • http://mutunibe.rf.gd/61555766711.pdfIn PDF document text
    • https://s3.amazonaws.com/penefelomiju/nubugenowizawiwa.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_off0000d758.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD758 5788 bytes
SHA-256: 3abb974150aab96931c09f5fcfa524830af123f0804bb5bb0330bd2cf1d5dfb9
font_01_sfnt_off0000eaf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF1 9984 bytes
SHA-256: 1c7778e9987d72cdf2124deed5878dab571b30c9509abe1aa2c65432f2f62f3e

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