Malicious PDF — malware analysis report

Static analysis result for SHA-256 4333dec7d2ee5864…

MALICIOUS

PDF

78.9 KB Created: 2021-05-22 04:26:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 14fad2b7a01d7f0f4649598187cbcef7 SHA-1: 72c5026188ccac0fab0ba03677ecfb009c8882ca SHA-256: 4333dec7d2ee5864c6221687e6977b5fa3f37e109d1394202e7b758c2aea0bff
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to redirect users. The document body, though heavily obfuscated, contains references to 'Gta san andreas indir' which is likely a lure to attract users. The presence of PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM heuristics, along with ClamAV detection as Pdf.Phishing.Trojan, strongly indicates a malicious intent to redirect users to potentially harmful sites.

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://golowaki.ru/strik?utm_term=gta+san+andreas+indir+%25C3%25BCcretsiz+gezginler+pc PDF link annotation
    • https://wonakusoxenim.weebly.com/uploads/1/3/5/3/135340368/tomozemabit-logasofupif-zodebolu-lokurifa.pdfIn PDF document text
    • https://mutovowi.weebly.com/uploads/1/3/4/8/134862221/415210.pdfIn PDF document text
    • https://lepoxaxilil.weebly.com/uploads/1/3/4/4/134498836/jemaxijidubigivofa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499999/normal_602f974e1a1ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391636/normal_5fd39a90eb486.pdfIn PDF document text
    • https://zajanitemamivow.weebly.com/uploads/1/3/2/3/132303208/8a254c1366a.pdfIn PDF document text
    • https://lapadodipelij.weebly.com/uploads/1/3/1/1/131164402/kujiwogirilipin.pdfIn PDF document text
    • https://rajagoka.weebly.com/uploads/1/3/1/4/131406288/foniresufuxi.pdfIn PDF document text
    • https://juxilejaguzu.weebly.com/uploads/1/3/4/4/134404551/5645419.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378857/normal_60539cdf7687b.pdfIn PDF document text
    • https://wovuxekas.weebly.com/uploads/1/3/4/3/134379471/9184988.pdfIn PDF document text
    • https://magazeja.weebly.com/uploads/1/3/5/9/135990405/ruzibiwezafita-xevet-bizirurati-ligexeti.pdfIn PDF document text
    • https://bepefuligifeval.weebly.com/uploads/1/3/5/9/135981888/maferexibi-jewuwogu.pdfIn PDF document text
    • https://tuxutumixebapi.weebly.com/uploads/1/3/1/4/131438514/7086879.pdfIn PDF document text
    • https://pajejasebuwosiw.weebly.com/uploads/1/3/0/8/130813778/vurokevugub_rawunolijal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501045/normal_605f797b92d57.pdfIn PDF document text
    • https://wiwamimojuwat.weebly.com/uploads/1/3/0/8/130813692/da26507651bd5.pdfIn PDF document text
    • https://vasinurevesodux.weebly.com/uploads/1/3/4/6/134605286/415223.pdfIn PDF document text
    • https://mumerigowijegap.weebly.com/uploads/1/3/4/7/134771458/rafalogizovudo_fijonow_wojofawufu.pdfIn PDF document text
    • https://renokogepebamon.weebly.com/uploads/1/3/2/6/132696434/fuvusanodogu-guwemusola-xuduram.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6329b9d-1d81-4fe6-a965-6da0afae82d8/26822312462.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b51ce470-b322-495f-a3cf-6ed7e46de7aa/67573054589.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a51f3abe-5d71-400c-a601-9edfd838881d/65957493774.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_off0000f315.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF315 5444 bytes
SHA-256: 0a3863b4006cca0e1db6cc5d0c79a92ba1b465e408d23d98b3399e89f7d53e6f
font_01_sfnt_off0001057e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1057E 12008 bytes
SHA-256: f171beca1032e69d98dd7d5cb28b63ed0d3ed0a03ae0c8766c362f84decdad2e