Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7ff0b9c66d37000…

MALICIOUS

PDF

76.7 KB Created: 2021-02-27 12:56:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 18527630c25603f3eab26b7b101068f9 SHA-1: 0ca2544d38100fc659661671e88771940a1c816c SHA-256: d7ff0b9c66d3700070125b0837d41070c41ef93358a4d44798d59de073cbf390
126 Risk Score

Malware Insights

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

The PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to disposable hosting, suggesting a link farm or phishing lure. While no scripts were explicitly extracted, the PDF structure and the nature of the embedded links indicate a likely attempt to redirect users to malicious sites, possibly for credential harvesting or malware distribution.

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://botokaw.ru/wb?keyword=the%20crown%20episode%201%20cast%20list PDF link annotation
    • http://neliwiveles.22web.org/bruce_lee_cinema_songs_ing_telugu.pdfIn PDF document text
    • http://bonapimum.iblogger.org/vyapam_profile_template_size.pdfIn PDF document text
    • http://lorewipa.scienceontheweb.net/how_did_europe_clean_up_after_ww2.pdfIn PDF document text
    • https://nudabubi.weebly.com/uploads/1/3/4/3/134323665/fagugosizomex-wegeru-nazuwudapopeda.pdfIn PDF document text
    • http://pazadixokumox.sportsontheweb.net/the_spectrometric_identification_of_organic_compounds_answer_manual.pdfIn PDF document text
    • https://dexanobibe.weebly.com/uploads/1/3/5/2/135299911/6208169.pdfIn PDF document text
    • http://siwosupegejolop.medianewsonline.com/how_to_start_coding_in_python_on_windows.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368223/normal_602ef6184094c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384819/normal_5ffe319869a5d.pdfIn PDF document text
    • https://tinonerapize.weebly.com/uploads/1/3/5/3/135349756/dofijizuledoke-xafubi-vevixa.pdfIn PDF document text
    • http://jamotovoxut.mywebcommunity.org/gimadomukatevijumidan.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374177/normal_60047c20a7559.pdfIn PDF document text
    • http://nopuvobetag.mygamesonline.org/what_does_red_wine_sauce_go_with.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379849/normal_60063a2bdf15d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lugirike.epizy.com/28495556053.pdfIn PDF document text
    • http://fiforeru.atwebpages.com/mastercam_x5_lathe_tutorial.pdfIn PDF document text
    • http://zipemoluligera.myartsonline.com/which_of_the_following_best_describes_the_experimental_probability_of_getting_heads.pdfIn PDF document text
    • http://fasitefikiseli.rf.gd/vaviwuzej.pdfIn PDF document text
    • http://fosufozixa.rf.gd/band_master_free.pdfIn PDF document text
    • http://rimebeg.epizy.com/email_template_for_business_inquiry.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_off0000f11b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF11B 5256 bytes
SHA-256: c8ac13058d29af9dd512cc9490a42aadef92eda69f9ac1aa85591d1d8f9b2361
font_01_sfnt_off00010309.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10309 10184 bytes
SHA-256: 30bdcf8325403556d3cd59e6c8763fc05abb4e08cb4c73f3e5725f9005774d31

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