Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5e7d0a00d2f3137…

MALICIOUS

PDF

77.2 KB Created: 2021-03-19 22:53:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d4a4e5967a80aa725872edc05184c06 SHA-1: 947c27d37323940565566b94676eb9c28cdaacc2 SHA-256: a5e7d0a00d2f3137171c5b1cfa4068c55f0037166c1ba56c0a3c404801084c44
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as a phishing trojan and a machine learning model assigned a high probability of maliciousness. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing campaign. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and 'Qt', indicating it was likely generated programmatically to host these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xezojetit.ru/wix?keyword=playstation+3+apk+android
    • http://dajexori.mypressonline.com/what_does_chance_mean.pdf
    • http://suzofovolavuk.scienceontheweb.net/1569469257.pdf
    • http://vevebopawo.mywebcommunity.org/xuporololokowenufera.pdf
    • http://minuette.me/venuvolejegovijovelebanefrn76.pdf
    • http://vodabutopidaru.getenjoyment.net/8206646022.pdf
    • http://seweripuwas.mywebcommunity.org/how_to_prevent_coastal_erosion_in_louisiana.pdf
    • http://zalavsky.ru/pizibulexe2qnk7.pdf
    • http://dommasters.site/99766605627wyv8v.pdf
    • http://ludirobus.getenjoyment.net/can_you_breed_dapple_dachshunds.pdf
    • http://xevamoz.mygamesonline.org/convertir_gramos_a_mg_dl.pdf
    • http://ronifibofizet.medianewsonline.com/pdf_to_ms_word_convert_free_download.pdf
    • http://tatuxuvoziparu.mywebcommunity.org/al_quran_with_urdu_translation_and_tafseer.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://a4346b84-4611-49ab-b113-80c9188ca613.filesusr.com/ugd/078c79_620eed5cba9a4885966290137c347337.pdf?index=true
    • https://uploads.strikinglycdn.com/files/bcc801d7-1099-48c0-95a5-4d12e494991e/how_to_run_python_script_in_atom_windows.pdf
    • http://sogurorirerew.onlinewebshop.net/how_do_you_write_a_graduation_speech_for_middle_school.pdf
    • https://uploads.strikinglycdn.com/files/0c06faab-5a70-4fd7-81ed-d3c6f5c78c0c/war_of_the_worlds_epix_review.pdf
    • http://wadoromutisagar.myartsonline.com/64742062042.pdf
    • https://d4bcd744-2348-4fe3-9006-05b2fcbd3cbd.filesusr.com/ugd/704566_7f6b32628bf74a9684abde15bad6380c.pdf?index=true
    • https://acd80754-3b70-42c6-a60f-3489f6261da4.filesusr.com/ugd/f1780b_7ec8d4e6c3b04eb78aba544a21228866.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef0e.bin
ee36dc0f58b76176668e020736f4e58a538b99024434c542877a7a43ead8e792		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF0E 5284 bytes
font_01_sfnt_off0001011f.bin
d2f9d537d923669bae3585738fa8cf644d67b65088a02a37c39ed06113db396e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1011F 11436 bytes

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