Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6f482736639ab9f…

MALICIOUS

PDF

71.1 KB Created: 2021-03-16 01:32:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: dc4fd45a395a64c1283c9c1d88ed339a SHA-1: 946583108bc8fe340f6376607b51f6461ee5433d SHA-256: b6f482736639ab9fc8d8ce0b75f0406343ee99a3de54bc256a05616335f3450e
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV. It contains numerous external URIs and is described as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The presence of embedded URLs suggests the document is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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://dugedepap.ru/wix?keyword=a+chip+of+glass+ruby+memorandum PDF link annotation
    • http://dakajak.medianewsonline.com/principles_of_ophthalmic_lenses.pdfIn PDF document text
    • http://proba7.xyz/is_starbucks_almond_milk_sugar_freedyua3.pdfIn PDF document text
    • http://viwesisikumebi.getenjoyment.net/40926691599.pdfIn PDF document text
    • http://kerutugizuxig.mygamesonline.org/asp.net_tutorial_with_c_sharp.pdfIn PDF document text
    • https://tebugusenaj.weebly.com/uploads/1/3/4/8/134870623/juromoxopabotasutu.pdfIn PDF document text
    • http://pukujadud.getenjoyment.net/calorific_value_definition.pdfIn PDF document text
    • http://tedaxebipajir.iblogger.org/22067199464.pdfIn PDF document text
    • http://olivamebel.com/jeet_kune_do_training_near_meqpvww.pdfIn PDF document text
    • https://xapitutas.weebly.com/uploads/1/3/0/8/130813648/0e8da4ee65c.pdfIn PDF document text
    • https://jigokuzubunuk.weebly.com/uploads/1/3/4/7/134750148/4753485.pdfIn PDF document text
    • https://levavepisemewo.weebly.com/uploads/1/3/5/3/135303450/7681909.pdfIn PDF document text
    • http://pijubunoze.22web.org/honda_lawn_mower_engine_parts_manual.pdfIn PDF document text
    • http://pasiworuwiwoz.getenjoyment.net/29747794233.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://megigezorozo.atwebpages.com/does_dunkin_donuts_make_decaf_iced_coffee.pdfIn PDF document text
    • http://vexabimumemig.atwebpages.com/ghost_boy_lyrics_jacob_tillberg.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/68300922467.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/cool_black_background_images_free.pdfIn PDF document text
    • http://tuwutexo.onlinewebshop.net/hunger_games_download_book_1.pdfIn PDF document text
    • http://kuzojif.rf.gd/romixupiveridikubo.pdfIn PDF document text
    • https://s3.amazonaws.com/zagapaxa/william_faulkner_as_i_lay_dying_summary.pdfIn PDF document text
    • http://zowomazo.epizy.com/leona_lewis_bleeding_love_song.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_off0000d9f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9F8 5800 bytes
SHA-256: d7938a4a9c75a702cc5abeb50f3a7e55fdcf801bbe37cd70d182b73ce1522071
font_01_sfnt_off0000ed93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED93 9844 bytes
SHA-256: a11d69904a619c9b068787841c3929a5e1dd3a2d8790a0cfdae6ceb3786e61e5

Open this report in the interactive analyzer, or submit your own file for analysis.