Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a5cc6f7ea11cecb…

MALICIOUS

PDF

90.3 KB Created: 2021-04-25 07:18:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 52470363d1b16eab9043be666047a7aa SHA-1: 186b975a3159592635229289845f3d65512476a5 SHA-256: 8a5cc6f7ea11cecb95c0dae9320322229c872416587c17bbf0d20d2c854079bb
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 0.9996

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=korg+sv-1+88bk PDF link annotation
    • https://cdn.sqhk.co/mojekuvugise/igfidJ9/81687245285.pdfIn PDF document text
    • https://cdn.sqhk.co/dekawako/2jgwrtw/lily_s_garden_ads_age_restricted.pdfIn PDF document text
    • https://netafipagugid.weebly.com/uploads/1/3/0/8/130814009/b84cfa3094.pdfIn PDF document text
    • https://cdn.sqhk.co/dejuxafe/2Pviem5/stickman_prison_counter_assault_mod_apk.pdfIn PDF document text
    • http://muvipokikuwopek.22web.org/lazozovabalami.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452372/normal_600281121c1df.pdfIn PDF document text
    • https://cdn.sqhk.co/lediname/YnNjgXq/zejejunepokomunekulamado.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385421/normal_60438a30ce3c1.pdfIn PDF document text
    • https://cdn.sqhk.co/sadopore/jiohcjb/xeweposob.pdfIn PDF document text
    • https://lerexujirizafet.weebly.com/uploads/1/3/4/3/134344290/7144167.pdfIn PDF document text
    • http://jaxagogilexet.sportsontheweb.net/xusojexifev.pdfIn PDF document text
    • http://remumedigudeja.22web.org/sulesevaligiwaluzo.pdfIn PDF document text
    • https://vasefifux.weebly.com/uploads/1/3/1/3/131382239/7671383.pdfIn PDF document text
    • http://xubanapirobula.mypressonline.com/mr_coffee_4_cup_coffee_maker_manual.pdfIn PDF document text
    • https://lenapejasuma.weebly.com/uploads/1/3/4/7/134749539/kemeditabakisor.pdfIn PDF document text
    • https://felinabaf.weebly.com/uploads/1/3/4/3/134380667/vosanare.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385206/normal_5fe2759f3efe8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pofavokazaf.rf.gd/85258005352.pdfIn PDF document text
    • http://luxupuxud.myartsonline.com/67054203182.pdfIn PDF document text
    • http://zirutabu.myartsonline.com/la_bibliothcaire_gudule_gratuit.pdfIn PDF document text
    • http://gitodake.myartsonline.com/72438219794.pdfIn PDF document text
    • http://zenakezogutomu.onlinewebshop.net/18066474709.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_off0001169f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1169F 5120 bytes
SHA-256: 8cc5c6b3757fd69036a0dd700b29cb0556a543948b2d2d029bc0a11e1604ceaa
font_01_sfnt_off00012841.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12841 16432 bytes
SHA-256: 2419f7b7ecac2e9b4f5d1994e22edead7c63cbbe70294e7109882205653b457a

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