Malicious PDF — malware analysis report

Static analysis result for SHA-256 11fe1e14f52ad5d0…

MALICIOUS

PDF

76.8 KB Created: 2021-03-18 05:48:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: a1b50b73ce6d013a1f1258f5b91b2fce SHA-1: 3eaae26ab6e4b7a862b2dff50ca552c55dac76f9 SHA-256: 11fe1e14f52ad5d06735b51ae467277cb6d64ca78e13dff54bd5daff35506eb8
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for Pdf.Phishing.Trojan. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm used for phishing or malware distribution. The ML classifier also strongly indicated maliciousness. While no scripts were directly extracted, the PDF structure and link farm behavior are indicative of a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://maypoin.ru/award?keyword=vehicle+tracking+system+project+documentation+pdf PDF link annotation
    • http://tendernes.ru/senobokenajodagipalijaux4e5.pdfIn PDF document text
    • https://xepidazezupos.weebly.com/uploads/1/3/5/3/135343087/nepomunuretul-fuwuligutizutiz.pdfIn PDF document text
    • https://sovejugi.weebly.com/uploads/1/3/4/6/134652237/foxumag.pdfIn PDF document text
    • https://fodonisegijiwos.weebly.com/uploads/1/3/1/4/131437376/surovulovetuvo.pdfIn PDF document text
    • http://sale20.site/63026055417tocxs.pdfIn PDF document text
    • http://iglivesupportteam.com/minafader01om.pdfIn PDF document text
    • https://leditolovon.weebly.com/uploads/1/3/2/6/132682688/bikijefa.pdfIn PDF document text
    • http://gufutaca3.xyz/physics_textbook_answers_aqa70nx0.pdfIn PDF document text
    • http://ig-about.net/dragon_tiger_gate_movie_tamil_dubbedl3ztw.pdfIn PDF document text
    • http://datinge.site/the_building_gamekdiay.pdfIn PDF document text
    • http://setlyb.online/9864690011rwtwv.pdfIn PDF document text
    • http://cardio-natural.info/abrahaminte_santhathikal_full_movie_cinemavilla8dna0.pdfIn PDF document text
    • http://dwatches.site/daniel_plan_intermittent_fastingf91xb.pdfIn PDF document text
    • http://50offshop.pro/apology_letter_format_for_schoolfi4w3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2a4065d7-883d-43e8-a524-7ce9aa4b4e88.filesusr.com/ugd/ccb1c6_50198979fe4541dc849d32bf561e4bbb.pdf?index=trueIn PDF document text
    • http://gezexibubaju.rf.gd/36626055942.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/how_to_stop_brother_printer_from_going_offline.pdfIn PDF document text
    • https://s3.amazonaws.com/legipalofi/80671074375.pdfIn PDF document text
    • https://b4140449-9b96-4148-8619-c9b3eed7b48c.filesusr.com/ugd/c33cdb_54bb797e9d8f4becb944223f8aee1009.pdf?index=trueIn PDF document text
    • http://jipokogave.epizy.com/hach_dr_890_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/1206653161.pdfIn PDF document text
    • http://komusera.rf.gd/jasirodegozuru.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_off0000ed75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED75 5776 bytes
SHA-256: 4bcf23942aebb47b1c34f636ba95173b6ac172e5e90e3f01bac89f2a0d93d50c
font_01_sfnt_off00010104.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10104 10724 bytes
SHA-256: 731fd19cffea88e70db25b41308418c8d72e97d6ad983e23898876678e382262

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