Malicious PDF — malware analysis report

Static analysis result for SHA-256 12107418ad07d753…

MALICIOUS

PDF

86.7 KB Created: 2021-02-25 00:46:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 827da5d981ed85881b5ef77f35f9056f SHA-1: e09cc4580dc207c693844a588143b69061436fb0 SHA-256: 12107418ad07d753a4bb139074683c94cbe8d48564aef1e46ce7549d1d0fb892
186 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URIs point towards an attempt to redirect users to malicious or deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 http://zanovekolasin.mywebcommunity.org/cheese_pasta_recipes_vegetarian_indian_style.pdf In PDF document text
    • http://lixorajepidil.mygamesonline.org/howls_moving_castle_wallpaper_engine.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383798/normal_6036d4fae42e3.pdfIn PDF document text
    • http://zexixojusikor.iblogger.org/gazomogaxofifuni.pdfIn PDF document text
    • https://cdn.sqhk.co/xezalagefog/viakPYC/ny_company_hours.pdfIn PDF document text
    • http://vugekowuzujed.scienceontheweb.net/farewell_my_lovely_film.pdfIn PDF document text
    • https://cdn.sqhk.co/saboxiwago/Widjahc/gallery_wall_layout_tool.pdfIn PDF document text
    • https://cdn.sqhk.co/jogekiluse/ij4heM9/basketball_legends_unblocked_76.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxinugad/cPTeBP4/car_plate_number_uk.pdfIn PDF document text
    • https://xoxigukot.weebly.com/uploads/1/3/4/8/134861038/9b517.pdfIn PDF document text
    • https://pumoguviponurin.weebly.com/uploads/1/3/4/7/134773216/pilavuza_jadoxegef_zukukegol.pdfIn PDF document text
    • http://lezigovedavide.getenjoyment.net/black_diamond_revolt_headlamp_user_manual.pdfIn PDF document text
    • http://xukewatamom.22web.org/movie_cyborg_she_sub_indo.pdfIn PDF document text
    • https://cdn.sqhk.co/pibusupi/iTZ7Zih/recette_sauce_sandwich_falafel.pdfIn PDF document text
    • http://fofesivolu.iblogger.org/64531147611.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480423/normal_6011bab074263.pdfIn PDF document text
    • https://jasefukop.weebly.com/uploads/1/3/0/7/130776564/c579dffe8093.pdfIn PDF document text
    • https://bologen.ru/wix?keyword=superstar+jypnation+mod+apk+2.7.2PDF link annotation
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000f01f.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000f01f.bin)
    • http://www.daltonmaag.com/In extracted file (font_03_sfnt_off00013e6f.bin)
    • http://dakafatuvuguviz.atwebpages.com/lekifo.pdfIn PDF document text
    • http://zaxalamel.rf.gd/59833267648.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 extracted file (font_00_sfnt_off0000f01f.bin)
    • http://dejavu.sourceforge.netIn extracted file (font_02_sfnt_off000129b2.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_02_sfnt_off000129b2.bin)

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f01f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF01F 5544 bytes
SHA-256: be77cc6962b51bb63a2c84a5925cb836f09062c3a7085f40d233f1168cce57fd
font_01_sfnt_off000102fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102FA 11264 bytes
SHA-256: 8b6958020c83b63c05b38acfc17ef390ea1f015aef29ab83fd59a1cc920ebc3e
font_02_sfnt_off000129b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129B2 16092 bytes
SHA-256: 1733294cd4efe6eb5a1c38b033a3da0bd69f43be3259469e0667c8323d1c848a
font_03_sfnt_off00013e6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E6F 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34