Malicious PDF — malware analysis report

Static analysis result for SHA-256 e17fc4eae11670cb…

MALICIOUS

PDF

78.8 KB Created: 2021-03-10 20:47:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 82a7508dbc199a317c8fb4889c0cf292 SHA-1: 422f2e86f627a1a9288bacbed541d31a5ed591ca SHA-256: e17fc4eae11670cb02ced4efbae897cb3aecc797356f2a5becef266ae8010534
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan distribution attempt. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious sites. The document body, though heavily obfuscated, appears to be a lure related to 'Chick fil a nutrition facts pdf'. No scripts were extracted, but the presence of numerous external links points towards a phishing or malware delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://baarspo.ru/strik?utm_term=chick+fil+a+nutrition+facts+pdf PDF link annotation
    • https://xivenisulebitok.weebly.com/uploads/1/3/1/3/131378814/d7af94b01.pdfIn PDF document text
    • https://cdn.sqhk.co/suvezadamut/JAUXjhn/xolazuwumudefumesijurut.pdfIn PDF document text
    • http://afracheat8.xyz/jedi_academy_no_cd_crackmw0wv.pdfIn PDF document text
    • https://cdn.sqhk.co/muzorefu/IeWgeMs/word_whizzle_yard_answers.pdfIn PDF document text
    • http://mebovaduzi.mywebcommunity.org/70374082932.pdfIn PDF document text
    • https://jewadasin.weebly.com/uploads/1/3/4/6/134604584/3baa60b8f.pdfIn PDF document text
    • http://hamlikjorettoop.ru/40099409938bd4i9.pdfIn PDF document text
    • http://lazujifoxupa.getenjoyment.net/18348999702.pdfIn PDF document text
    • https://rarozevalir.weebly.com/uploads/1/3/1/4/131437937/xatejinuwuj.pdfIn PDF document text
    • http://storeplus.info/jaziwedalasjrnu.pdfIn PDF document text
    • https://kipidabivipili.weebly.com/uploads/1/3/4/3/134340994/75d0f9e.pdfIn PDF document text
    • http://krokoboko6.xyz/blank_business_card_template_word_freeye1uj.pdfIn PDF document text
    • https://cdn.sqhk.co/dajuzafum/hjNWggz/4904496577.pdfIn PDF document text
    • http://gadatoreneperil.mygamesonline.org/give_me_liberty_brief_5th_edition_volume_1_free.pdfIn PDF document text
    • http://it50disconto.pro/tajafbyhwf.pdfIn PDF document text
    • http://xufededubumavif.scienceontheweb.net/83562604069.pdfIn PDF document text
    • http://rinujajija.getenjoyment.net/78331944991.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vubelifijam.atwebpages.com/engineering_materials_and_processes_book.pdfIn PDF document text
    • https://a72b158e-cead-41d6-a0b3-8518216316a4.filesusr.com/ugd/35c6e2_a32bf6df4ff54a5498cf6c9b9afe6f24.pdf?index=trueIn PDF document text
    • https://65de77fc-0341-4fd2-89b2-cd6b005a91de.filesusr.com/ugd/cf79db_f13feea6a7934290a827117babf33b4b.pdf?index=trueIn PDF document text
    • http://zutugidod.onlinewebshop.net/how_fast_is_a_2020_kawasaki_mule.pdfIn PDF document text
    • https://43cb2d18-1589-43a7-b1c5-fe1278e1c76d.filesusr.com/ugd/370b54_1ac5857cec9847ccb7814a68a431bcfd.pdf?index=trueIn PDF document text
    • http://xutenujute.myartsonline.com/61273404070.pdfIn PDF document text
    • https://7095e710-59ac-4d27-8a5a-f3bbcaf65deb.filesusr.com/ugd/418e76_98e5234fb13c46218d8c0b857d86cfe3.pdf?index=trueIn 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_off0000f74a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF74A 5212 bytes
SHA-256: d3107763a9a77f8cc9f6af70eb563f46341f0c88df7dd5cf6a0b498e3f6070bc
font_01_sfnt_off000108fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108FC 10848 bytes
SHA-256: 93dafe5404d64c41b16522d3244bb9f2868b0cb9dbcb300438eaa19f89c033c5