Malicious PDF — malware analysis report

Static analysis result for SHA-256 972ff326127f459b…

MALICIOUS

PDF

76.4 KB Created: 2021-02-12 08:13:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 7f0c53d0f8ec46b4fd85a6792b90a02e SHA-1: 766ed5675dc4944d6c90fad313fbe5635df1c383 SHA-256: 972ff326127f459b69a34ef8020908a99faf2d5a32fb6b8fa5b87377f3cee8dc
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, with a primary suspicious URL being https://maypoin.ru/wix?keyword=manual+britax+b+safe, suggesting a lure to a malicious site. The document body, though heavily obfuscated, appears to be an attempt to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/wix?keyword=manual+britax+b+safe PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4411917/normal_5fcc0d9165382.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481828/normal_5fe31ac979213.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384301/normal_5fe2a41059756.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490273/normal_600506b84b54c.pdfIn PDF document text
    • http://opensalon.xyz/midipomelikidirazenos0spa0.pdfIn PDF document text
    • http://tehnopolis.org/436563137875thwc.pdfIn PDF document text
    • http://startbastar.online/how_to_install_morph_mod_minecraft_peg2hcp.pdfIn PDF document text
    • http://christinaanddavid2019.com/bhula_diya_song_320kbpsyvfio.pdfIn PDF document text
    • http://fogugevup.22web.org/78903664612.pdfIn PDF document text
    • http://ch-data-2a8fv9s.pw/watoxekajuxodetimowhol1h.pdfIn PDF document text
    • http://petrol-v-pol-price.site/exemple_note_de_synthesermhv3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://xaviwawav.epizy.com/flyff_elementor_guide_2018.pdfIn PDF document text
    • http://mexesumofiruvaf.rf.gd/25625331011.pdfIn PDF document text
    • https://s3.amazonaws.com/mexesazaxasa/lezekem.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/grove_hall_nursery_ofsted_report.pdfIn PDF document text
    • https://s3.amazonaws.com/fosawef/97265174675.pdfIn PDF document text
    • https://s3.amazonaws.com/gurowozenupifi/candy_crush_saga_free_play_store.pdfIn PDF document text
    • https://s3.amazonaws.com/xugigabitulu/logo_quiz_game_answers_all_levels.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/85841723509.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3BF 4744 bytes
SHA-256: c98a0a0cfcff8a923076ee03349b3470112f76c0e344116a49a1a9c58426f8d4
font_01_sfnt_off0000f3e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E6 10148 bytes
SHA-256: a9dc55586b780cf23ff1ccf25f6d2e02530556a50a76d4c6fd68161d65fcf327
font_02_sfnt_off000116b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116B3 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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