Malicious PDF — malware analysis report

Static analysis result for SHA-256 002d2ff5d0082b23…

MALICIOUS

PDF

77.3 KB Created: 2021-03-04 01:05:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 22a123675adb1525534357b38b4ced08 SHA-1: 55d3eca630fe184c97f46efde09b632ea0fa2193 SHA-256: 002d2ff5d0082b2382f781155fa1638d8f1bb0958de6de8e5ad6f215324ba6f5
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting it's part of a link farm or SEO spam operation designed to redirect users to potentially harmful websites. The presence of external URIs and the overall structure strongly suggest a phishing or malicious redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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 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://nipisod.ru/wix?keyword=how+to+make+horse+armor+stand PDF link annotation
    • https://cdn.sqhk.co/wubofuse/iathjjh/menasubufanejesalafegijed.pdfIn PDF document text
    • http://topcreditcheck.info/highest_paid_microbiology_jobs_in_indiawcysj.pdfIn PDF document text
    • https://cdn.sqhk.co/dikizumi/bjigjhc/midazumemumililogati.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384825/normal_5ff712395bef4.pdfIn PDF document text
    • https://cdn.sqhk.co/jekurona/0FNhfji/chocolate_cake_recipe_using_buttermilk_uk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418199/normal_5fde1f67dcdfa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4527357/normal_5fd86f65a9c27.pdfIn PDF document text
    • https://jixawapideraje.weebly.com/uploads/1/3/3/9/133997308/9099588.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447251/normal_601bac78b7f1c.pdfIn PDF document text
    • https://ramokazadi.weebly.com/uploads/1/3/4/4/134470245/3b3e61f.pdfIn PDF document text
    • https://cdn.sqhk.co/jenojigise/iaqjjgj/razebigunirepe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456998/normal_5fd186efdfe97.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366050/normal_5fdd2d39c7039.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385869/normal_60400b3596549.pdfIn PDF document text
    • https://cdn.sqhk.co/rubuxupab/egi5whh/blocky_highway_runes.pdfIn PDF document text
    • https://fetesebi.weebly.com/uploads/1/3/4/8/134896421/3908a038401c.pdfIn PDF document text
    • https://cdn.sqhk.co/ligumorik/jjichaC/49277696331.pdfIn PDF document text
    • http://uscarins.info/1996_chevy_s10_brake_light_wiring_diagrammhpx0.pdfIn PDF document text
    • https://cdn.sqhk.co/jipogidara/djjjcD6/easy_chocolate_cake_recipe_using_cake_mix.pdfIn PDF document text
    • https://cdn.sqhk.co/dutararopat/iejajbI/92040436499.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393369/normal_5ff12340a5b2b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451549/normal_5fcf0793c7447.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000f24f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF24F 5152 bytes
SHA-256: d2108adfdf08a21b48fcb2acde998a73c469a6177d2bfc131b94b2a6b7186105
font_01_sfnt_off000103af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103AF 10432 bytes
SHA-256: a617bbd43b49b564cc5338038d52f61d6b850f89779fa443c1e908f4743a35d7