Malicious PDF — malware analysis report

Static analysis result for SHA-256 744cde39a14ea68a…

MALICIOUS

PDF

66.5 KB Created: 2021-03-02 00:50:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: f0acc03699516f31d5b57d61d0dce6ce SHA-1: be0a65d8965c0d31e12bae338407e46ea9563e34 SHA-256: 744cde39a14ea68aaa07bf0b6fd32167b074d4116db5962ca698eb63830b57d2
184 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to other PDF files hosted on disposable domains or free hosting services. This behavior is indicative of a link farm or SEO spam campaign designed to drive traffic to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8630

Heuristics 5

  • 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
  • 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://pelibifir.ru/award?keyword=what+is+the+application+of+statistics+in+real+life PDF link annotation
    • http://psylath.com/5697904124845jb4.pdfIn PDF document text
    • http://lorewipa.scienceontheweb.net/the_martian_movie_download_in_hindi_hd_720p.pdfIn PDF document text
    • https://wipuzene.weebly.com/uploads/1/3/5/9/135971348/9903714.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451566/normal_5fe4380ed16bc.pdfIn PDF document text
    • http://biotringel.shop/10817738753iv167.pdfIn PDF document text
    • https://kidamevu.weebly.com/uploads/1/3/1/4/131437276/c7dbcc3.pdfIn PDF document text
    • http://copyrighthelpcentral.com/fanolupagudokexugijxti4f.pdfIn PDF document text
    • https://govonomuvilikiw.weebly.com/uploads/1/3/4/6/134620083/futenazuxarurumagalu.pdfIn PDF document text
    • https://dodesagetulisuv.weebly.com/uploads/1/3/4/9/134902864/jevof.pdfIn PDF document text
    • http://xogunajeraxuda.mywebcommunity.org/tusofuziputumitepezar.pdfIn PDF document text
    • http://itsnat.space/the_north_atlantic_treaty_organization_nato_was_formed_for_the_purpose_of3fyri.pdfIn PDF document text
    • https://xefafarorul.weebly.com/uploads/1/3/4/6/134698093/604672.pdfIn PDF document text
    • https://kewidanuratug.weebly.com/uploads/1/3/5/3/135323433/3242374.pdfIn PDF document text
    • https://girosiwubu.weebly.com/uploads/1/3/0/7/130740458/5780158.pdfIn PDF document text
    • http://olx-delivery.cc/toefl_vocabulary_quiz_bookjpmd2.pdfIn PDF document text
    • http://maddot.space/maposibagoferezufivepe9p2g9.pdfIn PDF document text
    • https://suzefajadovu.weebly.com/uploads/1/3/4/5/134592553/gamiwaxova_xidedojegutaf_bukefonagid.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA08 5116 bytes
SHA-256: 9cb5ca4e5bbe79068cdbe32e6e6d6a2e82dc7b4f6a2e8f8c8feca38cc87bb596

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