Malicious PDF — malware analysis report

Static analysis result for SHA-256 210b47c58c9fc350…

MALICIOUS

PDF

73.4 KB Created: 2021-03-19 19:05:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 259597d3862c8343f1914bcfb1feead5 SHA-1: 24b1f24a45dc8e58702ae7c40404547146ccbbae SHA-256: 210b47c58c9fc350b3a66c7b498ad7895c0ab8fd03bc266d893c127d5cb46482
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 0.9997

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://druttle.ru/wix?keyword=wow+archaeology+leveling+guide PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4366653/normal_5ff58bae13874.pdfIn PDF document text
    • https://cdn.sqhk.co/fapetemiji/Wgdwjg8/wolo_giler_giler.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390056/normal_6002fc686490f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427079/normal_5fea2a5f43103.pdfIn PDF document text
    • https://cdn.sqhk.co/jitolado/jepXPN1/zazituzulunon.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368741/normal_5fffa8a19dc78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495040/normal_60466d443f567.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://86b7bb9a-6a0b-496c-a062-e8aa60c365d0.filesusr.com/ugd/dcf311_e7a96fd0cfbb485fbdc48d11e242c8a1.pdf?index=trueIn PDF document text
    • https://f06ae689-34e6-4fd9-b749-a5985747e370.filesusr.com/ugd/4117a9_c2be0d1f3f364832862fc563e7b7d5ac.pdf?index=trueIn PDF document text
    • https://16fd3b15-5541-4454-9538-28daacbf497e.filesusr.com/ugd/e32576_7830772cd05e44789b7f25b30dab484e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ronenitevodo/spaghetti_in_a_hot_dog_bun_lesson_plan.pdfIn PDF document text
    • http://lisuxuzilim.epizy.com/3169567063.pdfIn PDF document text
    • https://s3.amazonaws.com/mogedozara/82882404243.pdfIn PDF document text
    • https://3dcfbd4a-ef33-49dc-a04a-0aaf5307c30d.filesusr.com/ugd/b47706_1a2075ae29d14cfa870d9d5410d52804.pdf?index=trueIn PDF document text
    • https://45b0b119-5f8c-43e7-b437-4e12d17c1c81.filesusr.com/ugd/3826db_a8b9bd18411a43798848d523370d8fdf.pdf?index=trueIn PDF document text
    • http://mabazojow.rf.gd/are_you_supposed_to_stop_for_funeral_procession.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/rewimiwivotodaf.pdfIn PDF document text
    • https://3ae4d138-4ba3-4962-98fb-1b98b40a6a82.filesusr.com/ugd/38062a_c01fbf900af644ed98b88ed8b987013f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/dream_yuga_price_bike.pdfIn PDF document text
    • http://bejiteviv.epizy.com/post_malone_hollywood_s_bleeding_full_album.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_off0000e09c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE09C 5292 bytes
SHA-256: 732959a088edc06081012557fcc5da3ce43851952b53481f79015f6904329da9
font_01_sfnt_off0000f2b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B2 10560 bytes
SHA-256: bbcd501b7bc65a29fc259d0d2f380cf6ac1bdc2ac9126f077361061d886ef733