Malicious PDF — malware analysis report

Static analysis result for SHA-256 2272b2654b3860ef…

MALICIOUS

PDF

85.6 KB Created: 2021-04-20 22:53:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 40bd32ae2c318af9ff9d3abf26f45cea SHA-1: 976d95cbf9d871d2e2bc7efd8dd00973c100778d SHA-256: 2272b2654b3860ef0c0a558bf8cfdfdadb20604340ceb7636d79729cdc1cb441
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9994

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://resalured.ru/strik?utm_term=how+fast+can+a+125cc+pit+bike+go PDF link annotation
    • https://cdn.sqhk.co/zasemewiti/MMMx3hb/15864215781.pdfIn PDF document text
    • https://cdn.sqhk.co/lazujanaziri/a8Xjau3/wolf_slots_slot_machines.pdfIn PDF document text
    • https://cdn.sqhk.co/xaranoraf/gKjahbx/dejabuxalovepa.pdfIn PDF document text
    • https://cdn.sqhk.co/nugilatunu/WghSgiG/polytheistic_religion_meaning_in_english.pdfIn PDF document text
    • https://cdn.sqhk.co/rifelefiw/jhhb1km/minigames_minecraft_ps4.pdfIn PDF document text
    • https://cdn.sqhk.co/vusabutam/ibgFNcE/24528923668.pdfIn PDF document text
    • https://cdn.sqhk.co/kajutizikodu/FgjxXqf/pictoword_level_405.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369503/normal_5ff7c0060c8c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470678/normal_604c9d4a6011c.pdfIn PDF document text
    • https://figusemaf.weebly.com/uploads/1/3/2/6/132682639/534f38cfbb.pdfIn PDF document text
    • https://wejafivikime.weebly.com/uploads/1/3/0/9/130969279/0ae14cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382620/normal_60344e9e13409.pdfIn PDF document text
    • http://wordsideget.top/pokidonoh0we0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461744/normal_60109da0eb052.pdfIn PDF document text
    • http://mativazugu.22web.org/26226061005.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366034/normal_5ffb98fcca196.pdfIn PDF document text
    • https://zorovapi.weebly.com/uploads/1/3/2/3/132303286/761328.pdfIn PDF document text
    • http://sq11mini.com/310822418585fk68.pdfIn PDF document text
    • http://kpovli.ru/can_apple_airport_be_used_as_a_range_extenderbad1m.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zopuvebiwu.epizy.com/english_malayalam_calendar_2020_free_download.pdfIn PDF document text
    • http://larisakexifa.epizy.com/abiotic_vs_biotic_factors.pdfIn PDF document text
    • http://pigosegekezejol.epizy.com/what_does_screw_off_mean_in_text.pdfIn PDF document text
    • http://rozopujonabesix.epizy.com/anabolismo_de_las_proteinas.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_off00010f4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F4A 5620 bytes
SHA-256: d06ae871c2e3e7752a59278ceb5304bd2756d3dd2b7cc12737101369c33bfa52
font_01_sfnt_off000122a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122A9 11276 bytes
SHA-256: 0ae7855d87c006123446c5c5a19157296d307ec1110577ebb2411e8c7338da23

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