Malicious PDF — malware analysis report

Static analysis result for SHA-256 49f7a5c6aa53dfe7…

MALICIOUS

PDF

67.3 KB Created: 2021-02-18 15:49:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: fc4a83b7ca6d443085932578ea27f124 SHA-1: 87584f6e73c3c6e0cd7eb649007e13a70cced8a2 SHA-256: 49f7a5c6aa53dfe78230fbacd4c845562e4f4674fe9a572ba0fe33935bad7eb9
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of maliciousness. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The embedded content, though heavily obfuscated, appears to be related to product information, likely a lure to encourage users to click on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/strik?utm_term=viper+479v+remote+start+programming PDF link annotation
    • https://cdn.sqhk.co/letonolomo/Ngvcrji/taguwuwitifiperegawazaso.pdfIn PDF document text
    • https://jokilexagazoxo.weebly.com/uploads/1/3/4/6/134602179/1ff9b68b.pdfIn PDF document text
    • http://begetus11ppz.xyz/dirt_devil_ez_lite_canister_vacuum_cleaner4muuy.pdfIn PDF document text
    • https://dasatupulike.weebly.com/uploads/1/3/4/1/134131314/493963.pdfIn PDF document text
    • https://tarirubawapub.weebly.com/uploads/1/3/1/6/131606173/noluxukuzeg.pdfIn PDF document text
    • https://vojawozusuv.weebly.com/uploads/1/3/1/1/131164351/dunoliju.pdfIn PDF document text
    • https://gakafapokizi.weebly.com/uploads/1/3/5/3/135319358/lobawavafeve-wilowo-rekimibosivulu-fededeputofo.pdfIn PDF document text
    • https://cdn.sqhk.co/nakokixega/hbjeLnw/destiny_child_game_artist.pdfIn PDF document text
    • https://zegekeli.weebly.com/uploads/1/3/4/6/134616407/vifeko-xariweburofob.pdfIn PDF document text
    • https://cdn.sqhk.co/vilitemeru/jgjgiHA/download_pug_my_virtual_pet_dog_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/ferudati/aKjiXkM/jazulosonuxikebupage.pdfIn PDF document text
    • http://maxist.ru/jusifogbcx2s.pdfIn PDF document text
    • http://theboldpantsproject.com/redmi_airdots_bluetooth_driver_downloadf26wu.pdfIn PDF document text
    • https://kagilovudugavap.weebly.com/uploads/1/3/1/1/131164538/kulones.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zabevog/69758868641.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_off0000cad0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAD0 5456 bytes
SHA-256: 641f7d40d86be46b298f3c5f19606175862830badecc51fab8238084510039b1
font_01_sfnt_off0000dd5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD5F 10252 bytes
SHA-256: 8276472371ce1b40c22db7f3069b42483bcf75814ea87d337b84e9da78b8bf6c

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