Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7550f78e35aa275…

MALICIOUS

PDF

72.5 KB Created: 2021-02-28 01:49:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 639b5a16f8f6d56a9165f37fae04b158 SHA-1: 9afa53859cdcb4b97b36a81bb1b859d45bea782e SHA-256: f7550f78e35aa275b14f09352d097b2c492b06b4b738f7bb8b7a2b383fd030d1
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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/wb?keyword=mental%20toughness%20training%20for%20wrestling PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368243/normal_5fe7cf16f0542.pdfIn PDF document text
    • https://cdn.sqhk.co/fujigugi/hdhiwig/runescape_fish_mask.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376375/normal_5fd2ec1ce8e7a.pdfIn PDF document text
    • http://wijetaz.mypressonline.com/who_wrote_the_quran_quora.pdfIn PDF document text
    • http://clientbluebadge.com/99032502000ectpo.pdfIn PDF document text
    • http://unityfree.xyz/ross_jeffries_unstoppable_confidence_mp3n7d61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416921/normal_601875f558fa2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462775/normal_5fd0fe0b25661.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/nefagolom/factoring_perfect_square_trinomials_examples_and_answers.pdfIn PDF document text
    • http://jomovexujufadi.epizy.com/figure_of_speech_worksheet_for_grade_6.pdfIn PDF document text
    • https://s3.amazonaws.com/wupuxus/wetowuroxoruzogaw.pdfIn PDF document text
    • https://s3.amazonaws.com/bejokazemur/95736582180.pdfIn PDF document text
    • https://s3.amazonaws.com/farefasejikap/mivegagarakebobafotu.pdfIn PDF document text
    • http://xijotat.rf.gd/8194485593.pdfIn PDF document text
    • http://zevesijuduma.atwebpages.com/delirium_trilogy_book_4.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_off0000dda4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDA4 5128 bytes
SHA-256: 716b0866954e0a3faa34bf4f8b16c1e520ab4ebbbc0e307def13f1a6b799c9f3
font_01_sfnt_off0000ef2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF2C 11092 bytes
SHA-256: 0e9b3cddd3f2664347933b224d59b8b66cf5d6804aa66863db8546629d27bb6e