Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d7d51d0f4b9916f…

MALICIOUS

PDF

67.5 KB Created: 2021-02-13 14:42:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 4956f31ff88fbb42e511cf161a25c556 SHA-1: 025c5611d7f145989eabec58dd64af5b5b023899 SHA-256: 8d7d51d0f4b9916f2dd6b9cf8c5216f1dbd945d2fca1ce54d4f12be9aa86ba3a
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://bologen.ru/wb?keyword=newspaper%20report%20l%C3%A0%20g%C3%AC PDF link annotation
    • http://ximekitezup.iblogger.org/ableton_live_lite_9_fender_edition.pdfIn PDF document text
    • https://cdn.sqhk.co/dejuxafe/817ysgf/wilusunivono.pdfIn PDF document text
    • http://urologo.store/80627118390tecd4.pdfIn PDF document text
    • http://onlyforyou.space/hypercalcaemia_of_malignancy_guidelinesfib0w.pdfIn PDF document text
    • https://dofazodasi.weebly.com/uploads/1/3/0/8/130873943/aaaf917ff9.pdfIn PDF document text
    • http://morj.space/40545232310ifzhi.pdfIn PDF document text
    • http://fortuneocredit.com/guidebook_for_marines_11th_editionbtjcf.pdfIn PDF document text
    • https://jikodidujur.weebly.com/uploads/1/3/5/3/135319234/7976810.pdfIn PDF document text
    • https://sawotulexude.weebly.com/uploads/1/3/5/2/135298589/noxixun.pdfIn PDF document text
    • https://wumaviki.weebly.com/uploads/1/3/0/8/130874148/lagatorilesa.pdfIn PDF document text
    • https://foravidamekog.weebly.com/uploads/1/3/2/3/132303307/sulatometevon-paxexetozef.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/timeziso/52703181082.pdfIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/explorations_in_core_math_8th_grade_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/geraromu/indiana_jones_cosplay_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/galvanized_steel_sheet_metal_weight.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/associer_plusieurs_mac.pdfIn PDF document text
    • http://xavisijividefo.epizy.com/65539222604.pdfIn PDF document text
    • http://donenufalu.rf.gd/17523082310.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_off0000bf5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF5A 5336 bytes
SHA-256: d4d8fb9078244e62fe48fa27268f1a24ea2268cd17f99f60c7534d6a14f4612e
font_01_sfnt_off0000d115.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD115 20336 bytes
SHA-256: 17de1e893ac7e0f61560aacc9f5a0f5ddc130aa809f81b3b4d186f8936a78081