Malicious PDF — malware analysis report

Static analysis result for SHA-256 08dfced45d4ae906…

MALICIOUS

PDF

76.3 KB Created: 2021-03-03 15:59:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 1e0a112406a2a95a14632a755ccf5db9 SHA-1: 48cad66c6ebffac114c5ef297f1a1d96b0ab9bd6 SHA-256: 08dfced45d4ae906fabcaea5f28d4810a05e6d8148fae87f1692c76ccf0ed1a9
126 Risk Score

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 a large number of embedded URLs, many pointing to disposable hosting and employing UTM parameters, indicating a link farm designed to redirect users to malicious sites. The document body, though heavily obfuscated, appears to contain text related to exercise, likely a lure to disguise the malicious intent of the embedded 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://gimoguvi.ru/strik?utm_term=what+exercise+to+do+for+slim+legs PDF link annotation
    • https://cdn.sqhk.co/puxolika/eghsR5U/smashbox_eyeshadow_primer.pdfIn PDF document text
    • https://cdn.sqhk.co/detaludolef/xhdhbQM/us_civil_war_battle_of_antietam.pdfIn PDF document text
    • https://cdn.sqhk.co/rawewosit/gjghejc/blue_bottle_meaning_in_malayalam.pdfIn PDF document text
    • http://dewisazovuvoxi.mywebcommunity.org/miwifepovoxaratarex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446045/normal_5fe69a26df985.pdfIn PDF document text
    • http://rakadan.sportsontheweb.net/2001_mercury_225_efi_weight.pdfIn PDF document text
    • https://cdn.sqhk.co/wogokodu/cjdijRi/jhonartop_recharge_product.pdfIn PDF document text
    • http://xenejesujotolud.mypressonline.com/which_cleans_teeth_better_oral_b_or_sonicare.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485309/normal_5fd1be829091d.pdfIn PDF document text
    • https://cdn.sqhk.co/pixazizaze/jbKOKgf/bibirego.pdfIn PDF document text
    • https://cdn.sqhk.co/texojijoraso/gcnuidK/rarevojewobibowem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366365/normal_603b16249d71e.pdfIn PDF document text
    • http://xuwuvewisin.mypressonline.com/what_is_the_text_structure_of_the_last_paragraph.pdfIn PDF document text
    • http://regivag.iblogger.org/34105039472.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://koroxep.rf.gd/kindergarten_cutting_practice.pdfIn PDF document text
    • http://kazaxese.epizy.com/51770127309.pdfIn PDF document text
    • http://pukafenofi.epizy.com/late_for_work_warning_letter_template.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A1 5200 bytes
SHA-256: 1f329cff5a222667f480ec1eee0f100558ee20be210e3d379677b09ec3d144f8
font_01_sfnt_off0000f364.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF364 10184 bytes
SHA-256: 6842cef156af5753c43e523d7a0b461381c2149de4688ae9f443282449fef796
font_02_sfnt_off00011600.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11600 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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