Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dd3c3362e3476a8…

MALICIOUS

PDF

76.2 KB Created: 2021-03-06 20:42:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: b76d376ddf64046627adf69147ed6080 SHA-1: dd1eb05b0d2b27b63fb4d577f0f838b4416bd43e SHA-256: 7dd3c3362e3476a8b5e2cf7d057d7043092e7d798c005fc8f4efcb14e1a731b7
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, specifically flagged as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, contains text related to 'personal development objectives for work examples', likely a lure to encourage clicks on the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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.
  • 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://jumiwimov.ru/strik?utm_term=personal+development+objectives+for+work+examples PDF link annotation
    • https://cdn.sqhk.co/nosimasiv/hhfhfge/54975681178.pdfIn PDF document text
    • https://cdn.sqhk.co/lepowabog/UHhd8tU/best_cool_ringtone_for_android_phone.pdfIn PDF document text
    • http://redanixidofax.iblogger.org/42933960823.pdfIn PDF document text
    • http://lizuzezusad.medianewsonline.com/xozumevap.pdfIn PDF document text
    • https://cdn.sqhk.co/disumuneriva/eaRQXhh/star_wars_kotor_mega_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/bivuwusim/2r7gcrz/alchemy_1000_all_elements.pdfIn PDF document text
    • http://xubixaxar.22web.org/resistance_band_training_program_for_beginners.pdfIn PDF document text
    • http://tadajixilatu.scienceontheweb.net/vuxegafasurez.pdfIn PDF document text
    • http://lotefevedajo.22web.org/brain_and_behavior_a_cognitive_neuroscience_perspective.pdfIn PDF document text
    • http://bafedudovodamo.medianewsonline.com/how_to_watch_after_we_collided_on_netflix.pdfIn PDF document text
    • https://cdn.sqhk.co/gixelotopa/fABjahj/52018103461.pdfIn PDF document text
    • https://cdn.sqhk.co/tijinujul/djmHEjb/etisalat_business_super_application_form.pdfIn PDF document text
    • http://sawemawe.mywebcommunity.org/how_to_reset_a_samsung_tablet_a6.pdfIn PDF document text
    • http://sitebomobegux.sportsontheweb.net/scatter_plot_practice_worksheet_answers.pdfIn PDF document text
    • http://bopugafuwu.scienceontheweb.net/sparknotes_the_scarlet_letter_chapter_20_summary.pdfIn PDF document text
    • https://cdn.sqhk.co/dukosisevu/gghwchf/steam_link_roku.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bolirazebaf.myartsonline.com/bozugokuxide.pdfIn PDF document text
    • https://4c5ad993-366d-4b3a-aa99-9b6f56583180.filesusr.com/ugd/01e791_fe476beaf291404fb86d58be09fc9c1e.pdf?index=trueIn PDF document text
    • http://keporumutiwem.epizy.com/3397240876.pdfIn PDF document text
    • https://9cf5cc10-3c2e-4e30-ae6b-73ed7beed88a.filesusr.com/ugd/5c2b46_cd68b7c302c944d79b82e2e546d643f1.pdf?index=trueIn PDF document text
    • http://xomapagovujux.atwebpages.com/48808759431.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_off0000ec1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC1B 5800 bytes
SHA-256: d5e7f0c31e02363dee17cca275e2bf2b6174bd36f159d9a6893d3d1ae2e2034c
font_01_sfnt_off0000ffe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE3 10404 bytes
SHA-256: 3ad2a2e6aac3052ca3eda73a747b5bc10d4f974d7cb5d7e100aed3967cf3f8a8