Malicious PDF — malware analysis report

Static analysis result for SHA-256 7201aa722d065a81…

MALICIOUS

PDF

68.4 KB Created: 2021-02-15 12:56:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: d93c16b6a1a3919445f29a10fe0b9859 SHA-1: bffc16240d1875fe6e92fb8ef7513643ae201235 SHA-256: 7201aa722d065a810c7e1b311043bb1d371b3ed462174ed426c64fda5465ead5
186 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains a significant number of external links, suggesting a link farm or SEO manipulation tactic. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external URLs point towards an attempt to redirect users to potentially harmful content or phishing sites.

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://druttle.ru/wix?keyword=a+word+that+starts+with+bi PDF link annotation
    • https://cdn.sqhk.co/rolidofajug/ejFZdig/partidazos_play_futbol_tv.pdfIn PDF document text
    • https://cdn.sqhk.co/luwokiseg/ih8jjif/46640718445.pdfIn PDF document text
    • https://cdn.sqhk.co/bazexolareja/vKhahg0/gilugedirevuzakozos.pdfIn PDF document text
    • https://cdn.sqhk.co/doginifa/jihi40s/zupikoxajofusiverew.pdfIn PDF document text
    • https://sesadawaroni.weebly.com/uploads/1/3/5/2/135295108/luxoluxutufidateke.pdfIn PDF document text
    • https://budojidotepaso.weebly.com/uploads/1/3/5/3/135312143/pejoxasap.pdfIn PDF document text
    • https://tatedugede.weebly.com/uploads/1/3/4/3/134311852/114090.pdfIn PDF document text
    • https://wisatevifo.weebly.com/uploads/1/3/0/7/130775851/gozik.pdfIn PDF document text
    • https://cdn.sqhk.co/busoleva/JEjeIja/65987447986.pdfIn PDF document text
    • https://cdn.sqhk.co/fumodolanes/jo3ifMp/glowing_live_wallpaper_pixiz.pdfIn PDF document text
    • https://guzepebizosi.weebly.com/uploads/1/3/4/8/134880367/butetukifupamin.pdfIn PDF document text
    • https://nidikibadut.weebly.com/uploads/1/3/1/4/131453007/tarujejuw-filesu-gasometemijaz.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/genijusemu/skribbl_io_cheat_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxefemebidaz/kadiwoxapabodumut.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxuledo/biocentrismo_livro.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/batman_hd_wallpapers_for_laptop.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_off0000cf83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF83 5100 bytes
SHA-256: 64b1664b1a349e39b1ebfb0a3e82d8f6862611acc8d969e5d65e155dbc8c2e1b
font_01_sfnt_off0000e0e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E0 10340 bytes
SHA-256: 0defd38112c3a989a5fe7a71790073b34b62adac1161870e2a002faf518f5a7a

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