Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bd9756eb308e0a0…

MALICIOUS

PDF

83.5 KB Created: 2021-05-10 08:54:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 35c152c5fd2cff7259af5def32ba3d81 SHA-1: ee3800ab952d81155c829a1603c7c8674032a476 SHA-256: 3bd9756eb308e0a0c227c7a9244ae6c30ad7c23ccf509eacabf3ee49d12251e4
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample was flagged by multiple heuristics, including ML and ClamAV, as malicious. It contains numerous external URIs, many pointing to disposable domains or link farms, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the PDF structure indicate an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://kuzutuzo.ru/strik?utm_term=ophthalmic+abbreviations+od PDF link annotation
    • http://stroiline74.ru/xinujosirixoxj4oqb.pdfIn PDF document text
    • https://cdn.sqhk.co/femokuxajuz/Eohf8jg/hangman_movie_plot_2017.pdfIn PDF document text
    • http://demask.space/99095693906pyl0l.pdfIn PDF document text
    • http://vipmanmarket.space/how_to_replace_frigidaire_gallery_ice_makerbit05.pdfIn PDF document text
    • https://cdn.sqhk.co/febowozefu/8UhhEnf/winowebedegoxe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425507/normal_6046c7f711a76.pdfIn PDF document text
    • https://cdn.sqhk.co/lesepivir/cm8rNif/drive_by_song_lyrics.pdfIn PDF document text
    • http://bitjoms.xyz/betrayal_at_house_on_the_hill_rules_2nd_editionupes6.pdfIn PDF document text
    • http://dream-stat.ru/jisipugazawez461q1.pdfIn PDF document text
    • https://cdn.sqhk.co/libuzewis/ie5Tkhg/na_remote_for_dune_hd_pro_apk.pdfIn PDF document text
    • http://fruitik.space/ccna_1_chapter_6_exam_answersmea3w.pdfIn PDF document text
    • http://clipshd.design/grammar_practice_worksheets_10th_gradeill4u.pdfIn PDF document text
    • http://muldwych.com/548502246110sbmh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492586/normal_60253da0a8aae.pdfIn PDF document text
    • http://ital-tess.space/cannibal_corpse_full_album_zipersyh.pdfIn PDF document text
    • http://changely.club/59707752865jekty.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391315/normal_5fd92126640c4.pdfIn PDF document text
    • http://xuforaxi.22web.org/figo_pet_insurance_claim_form.pdfIn PDF document text
    • https://cdn.sqhk.co/fapewakuw/jThjjjl/tuvetivupol.pdfIn PDF document text
    • http://yazansoft.com/225254437656nyvr.pdfIn PDF document text
    • http://seamanygau.best/395573622699jztu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lujubozugib.epizy.com/janna_urf_guide.pdfIn PDF document text
    • http://wisotuv.epizy.com/mivadaliwaxigedelufagasi.pdfIn PDF document text
    • http://renaxodemebi.rf.gd/wozukepixuleme.pdfIn PDF document text
    • http://luxilim.epizy.com/wopizifita.pdfIn PDF document text
    • http://en.wikipedia.orgIn 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_off00010783.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10783 5540 bytes
SHA-256: 7a54e8be7e8e81a2d1aeb141292c69c296ff12ed2af1b66bb16cf2320c838670
font_01_sfnt_off00011a26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A26 11180 bytes
SHA-256: bb2bff7b44e836f520923d7fea0eed6621728c6f8880a3731b67c7faf78cd6ce

Open this report in the interactive analyzer, or submit your own file for analysis.