Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd1fe2402d56f964…

MALICIOUS

PDF

76.8 KB Created: 2021-02-26 20:51:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 5e4d942b3fb2bd003b92135ab410996d SHA-1: b44a5cedb833ffc46cc19cde6af2f0ed0725e900 SHA-256: dd1fe2402d56f96450bd7edb3c1972d57f617d73f7650119bbd17c0e4503cbc2
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. ClamAV and ML classifiers flagged this PDF as malicious, specifically as a phishing trojan. While no scripts were directly extracted, the PDF structure and numerous external URIs suggest it's designed to redirect users to potentially malicious or spam content, aligning with a phishing or malicious redirection attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://lozipotod.ru/123?utm_term=best+photo+book+printing+service PDF link annotation
    • http://lojapidabud.mypressonline.com/que_es_un_titulo_de_credito_hipotecario_negociable_peru.pdfIn PDF document text
    • http://ketotreno.buzz/45631565765fdjk4.pdfIn PDF document text
    • http://storeyou.store/kettlebell_core_exerciseswr08c.pdfIn PDF document text
    • http://leree4.club/zujuvagowovemimarazekuv8j589.pdfIn PDF document text
    • https://lelopotive.weebly.com/uploads/1/3/0/7/130738546/nujuwerezaxeva-witonelalefov-zolotuwuxa-vinajivisif.pdfIn PDF document text
    • http://gta-msk.ru/how_do_i_enable_airprint_on_my_epson_printernjmqc.pdfIn PDF document text
    • https://wuwabisa.weebly.com/uploads/1/3/1/6/131606234/xowufit.pdfIn PDF document text
    • https://bivuremopukojez.weebly.com/uploads/1/3/0/7/130740249/wivakebejivari_rijexiwetowiluj.pdfIn PDF document text
    • https://fenatafu.weebly.com/uploads/1/3/1/6/131637570/e7020.pdfIn PDF document text
    • https://donedupefunesu.weebly.com/uploads/1/3/1/6/131607777/1112954.pdfIn PDF document text
    • http://dafagaketa.sportsontheweb.net/yamaha_mg10xu_mixer_case.pdfIn PDF document text
    • https://winugemu.weebly.com/uploads/1/3/1/0/131070294/gaborudubunusatonaja.pdfIn PDF document text
    • http://rasudilikid.mywebcommunity.org/bruce_lee_greatest_movies.pdfIn PDF document text
    • http://dotavulilego.mypressonline.com/namatirupikivigonixo.pdfIn PDF document text
    • https://xutorobufazam.weebly.com/uploads/1/3/5/3/135345650/38a826d6a676.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gosaduzunake.myartsonline.com/55762494067.pdfIn PDF document text
    • http://kavibajegis.onlinewebshop.net/aasl_standards_framework.pdfIn PDF document text
    • http://pelebirepopo.onlinewebshop.net/nipikivugigagufu.pdfIn PDF document text
    • http://kakasis.onlinewebshop.net/dasoxopusonagovij.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_off0000eeaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEAA 5264 bytes
SHA-256: bef0bc5214d7bf2b72589fafb7ed7cc90d37ab7aa9ae9454f3febfcaadaae200
font_01_sfnt_off000100a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100A1 10920 bytes
SHA-256: 4a45da37d234709daafe8d2d9c1292723aaaff4e34c1a5e8b7c793cc66e9b533

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