Malicious PDF — malware analysis report

Static analysis result for SHA-256 0139711b921698ff…

MALICIOUS

PDF

90.8 KB Created: 2021-04-22 02:16:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e1f71bd9dc115b95d2a8ee333d43d5b3 SHA-1: c0bbb77f300b745cdf8e4fee3ba8798e75faeaee SHA-256: 0139711b921698ff4ab5d1f64bf807d3e91f5c4a9bd609e7f38f9afb67abc053
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gimoguvi.ru/strik?utm_term=south+indian+non+veg+menu+list PDF link annotation
    • https://xawavefite.weebly.com/uploads/1/3/4/6/134667803/vowapanuxebulawalasa.pdfIn PDF document text
    • https://rekinijibir.weebly.com/uploads/1/3/2/3/132302710/691fd7ea6e.pdfIn PDF document text
    • https://lelopotive.weebly.com/uploads/1/3/0/7/130738546/rabupipi.pdfIn PDF document text
    • https://cdn.sqhk.co/jusupovexewa/LdhixMc/dinosaur_rampage_gameplay.pdfIn PDF document text
    • https://cdn.sqhk.co/lajefage/ifcjgie/58222845985.pdfIn PDF document text
    • http://lizuzezusad.medianewsonline.com/spoken_english_guru_book_download.pdfIn PDF document text
    • https://cdn.sqhk.co/gabironero/icidgeq/colorful_french_tip_press_on_nails.pdfIn PDF document text
    • http://dekoriribazovax.mywebcommunity.org/4076612446.pdfIn PDF document text
    • https://cdn.sqhk.co/ketejeti/cIghAha/space_engineers_spaceship_designs.pdfIn PDF document text
    • https://vabeluzaxudi.weebly.com/uploads/1/3/4/8/134884936/3888216.pdfIn PDF document text
    • http://midikakuvekume.mywebcommunity.org/html_tags_list_with_description.pdfIn PDF document text
    • https://genunilime.weebly.com/uploads/1/3/4/3/134344847/6383828.pdfIn PDF document text
    • https://cdn.sqhk.co/kusamika/Fgeja5G/nirarimadonepudonejifufi.pdfIn PDF document text
    • https://cdn.sqhk.co/linerutinew/hdjiqig/motorcycle_mechanic_simulator_apk_mod.pdfIn PDF document text
    • http://dotekebenutedex.scienceontheweb.net/biogeochemical_cycles_of_nitrogen.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wopojofa.atwebpages.com/heat_conduction_equation_in_spherical_coordinates.pdfIn PDF document text
    • https://e82ff0bd-cb1a-4782-8b92-0a0fb7657660.filesusr.com/ugd/d17951_dddc67da0287497a990bcf9a7a8863b8.pdf?index=trueIn PDF document text
    • http://jutagejefutix.atwebpages.com/61812163000.pdfIn PDF document text
    • https://911f1565-2faa-4874-b261-330d521e7362.filesusr.com/ugd/f46427_135edcde20e44e228192bdf6fac3ab2d.pdf?index=trueIn PDF document text
    • http://sipanokule.onlinewebshop.net/how_to_cook_a_pork_roast_in_a_power_cooker.pdfIn PDF document text
    • http://lekeviwa.onlinewebshop.net/subonimegivorawubuji.pdfIn PDF document text
    • http://tizeruxabono.onlinewebshop.net/calendrio_2020_com_feriados_nacionais.pdfIn PDF document text
    • https://88966db1-4a83-4446-b941-f65022a6235f.filesusr.com/ugd/928e0f_b478792b61a04e158ca0230406ed8a22.pdf?index=trueIn 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_off000124ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124ED 5308 bytes
SHA-256: 24e630fe8714031fda72273e66bc569535f96fc2814655052c7009f018cecd0a
font_01_sfnt_off000136dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136DD 10952 bytes
SHA-256: 91a12feef0cc21b1997eaf3764eb9a408d2fcd9319a0fe55fa3f907199896224