Malicious PDF — malware analysis report

Static analysis result for SHA-256 71942d61b1219983…

MALICIOUS

PDF

105.8 KB Created: 2021-03-24 09:01:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 7845c69a3950b9b5c479a2bb58d5cab2 SHA-1: c457a4d995f520240f1c01789eacfa6efde3b0d9 SHA-256: 71942d61b1219983ce6a76fa78809c986f6c3ff1ebc5ea80974ccd65282e3999
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to disposable domains and link farms, indicating a strong intent to redirect users to potentially harmful content. The document body, though heavily obfuscated, contains references to product pricing and technical terms, suggesting a lure for commercial or technical scams.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://soxebez.ru/strik?utm_term=fluke+1507+price+philippines PDF link annotation
    • https://cdn.sqhk.co/pogadidotilu/gd3whjh/94694951869.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386354/normal_603bdc43c3281.pdfIn PDF document text
    • http://ukranews.site/pulse_oximeter_cvs_how_to_read8j27y.pdfIn PDF document text
    • http://xoxuvajes.mywebcommunity.org/anemia_de_fanconi_tratamiento.pdfIn PDF document text
    • http://onlyforyou.space/auto_clicker_for_ipad7svmy.pdfIn PDF document text
    • http://sugameloxufe.mywebcommunity.org/pujususokunigaximeliju.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480581/normal_5ffa9b3267aab.pdfIn PDF document text
    • https://cdn.sqhk.co/pefevepufi/jjhshdn/julikuvajusuxaponujore.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370273/normal_601e8af13691e.pdfIn PDF document text
    • http://copyrightviolationcenters.com/ucla_art_history_major_acceptance_ratenqved.pdfIn PDF document text
    • http://magnitoli-2ekran.site/60706662567h5d2y.pdfIn PDF document text
    • https://cdn.sqhk.co/nobixapo/8PhjhhO/red_dead_2_age_review.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386829/normal_60296a78807c8.pdfIn PDF document text
    • http://makelemeg.mygamesonline.org/paulk_workbench_2.pdfIn PDF document text
    • http://shoop-fn.ru/borejigeroiq4f.pdfIn PDF document text
    • https://cdn.sqhk.co/depadukat/hhd1ag3/75209450232.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/72c00569-6c14-478b-b463-cdcb047e055d/noduvabupipomov.pdfIn PDF document text
    • https://9e084d23-5bbf-42ad-98e9-fa9200f8584e.filesusr.com/ugd/4f663b_573c705d2cfd45eba867958ce062fb68.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0646acdf-2ebd-47f4-a09a-9741e3eb9bc1/ketopotazajojeneki.pdfIn PDF document text
    • https://f3b8d348-8566-49c9-a9f8-a2c3b9e1bc8e.filesusr.com/ugd/f1c748_75e4a5adf2b24451ae5a8ad2ab0577e7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb6af658-7ade-49d9-ae26-524c150a1a6d/kojiva.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_off00015f86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F86 5228 bytes
SHA-256: 66fb6fd0c5943a27fd743620aedab40dc4d8b2192de993aadf4a720a237a8726
font_01_sfnt_off00017162.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17162 11712 bytes
SHA-256: db58088eaaeabea0cebea1814577a52f28a27e30311eaafa1b7f890a54f5d534

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