Malicious PDF — malware analysis report

Static analysis result for SHA-256 2342fa67fcd732bd…

MALICIOUS

PDF

87.4 KB Created: 2021-03-08 03:03:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 15ab2452d1e744b647bcb886362756cb SHA-1: 25fc5d9f50560c861605f01dd7c1d886dd4b20a1 SHA-256: 2342fa67fcd732bd77f632bfd837ac09e6a9f84316d0ebbd59ca209587270f7b
244 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains a large number of embedded links, many pointing to disposable hosting and redirectors, suggesting a link farm or phishing attempt. One critical heuristic indicates a link to known malicious redirector infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/strik?utm_term=the+saxon+stories+tv+show In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374024/normal_6023cc7b26924.pdfIn PDF document text
    • https://kixusoboli.weebly.com/uploads/1/3/5/3/135394292/fuvoponerujumavudeva.pdfIn PDF document text
    • https://jadojojipolukot.weebly.com/uploads/1/3/5/3/135337887/julokafug_wupaluzi_nowesaforakiriw.pdfIn PDF document text
    • http://latomixoxa.iblogger.org/storcenter_ix2_firmware_recovery.pdfIn PDF document text
    • https://nusuwexob.weebly.com/uploads/1/3/4/3/134352417/26de71b.pdfIn PDF document text
    • http://senigudalow.iblogger.org/calendar_2019_malaysia_monthly_template.pdfIn PDF document text
    • https://bitojobuf.weebly.com/uploads/1/3/4/8/134892495/gedofuzod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412377/normal_60204466231f1.pdfIn PDF document text
    • https://siximegam.weebly.com/uploads/1/3/1/4/131453251/8637495.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383446/normal_5fe9df06b5c75.pdfIn PDF document text
    • https://fuwudasex.weebly.com/uploads/1/3/1/0/131071129/lejotugexepuzotole.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375889/normal_5fc577854f6c2.pdfIn PDF document text
    • https://malitizume.weebly.com/uploads/1/3/4/0/134097131/2162399.pdfIn PDF document text
    • https://duzareledibasa.weebly.com/uploads/1/3/4/8/134890493/6959050.pdfIn PDF document text
    • https://nanotobu.weebly.com/uploads/1/3/4/6/134638189/rakoxisokuvin.pdfIn PDF document text
    • https://zavowajasobi.weebly.com/uploads/1/3/1/4/131406950/1ce9046b.pdfIn PDF document text
    • https://rakulemiz.weebly.com/uploads/1/3/2/6/132682689/renaze.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mizeteb/can_you_hide_pictures_on_iphone_8_plus.pdfIn PDF document text
    • http://vivizegijarugip.epizy.com/business_card_maker_creator_premium_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/fuel_economy_guide_epa.pdfIn PDF document text
    • http://fabomisibis.rf.gd/xewimiwigugepoba.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_off000114ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114FF 4908 bytes
SHA-256: e379cca4960a5e0c2a5133e9ed05fe18e719a2b6969ecd8384b288d5df868d7d
font_01_sfnt_off000125ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125BA 13260 bytes
SHA-256: 16ef9f17a49037b21ebb3178f5e42cc6a812c0caea5bd3c36ff99a1dbfd40794