Malicious PDF — malware analysis report

Static analysis result for SHA-256 756a125664f090e7…

MALICIOUS

PDF

79.2 KB Created: 2021-05-11 07:58:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 16da50e22a2332545ee7a1ce0b5c3439 SHA-1: 3c0393781cf8a7a5df3d42e9bfba93894db2dc12 SHA-256: 756a125664f090e754c4e6a59ac9c7e5eeb7531aaf3a2b08278513d90e3a36d0
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting and are likely part of a link farm designed to obscure the ultimate malicious destination. The primary URL, https://mezovuduw.ru/strik, is presented in a context that suggests a phishing or scam attempt, masquerading as an answer to a user's query. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://mezovuduw.ru/strik?utm_term=why+is+my+motion+sensor+light+flashing PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4491432/normal_602c514b566f1.pdfIn PDF document text
    • http://kiwenalod.medianewsonline.com/veg_recipe_of_india_chilli_paneer.pdfIn PDF document text
    • https://gegefajowib.weebly.com/uploads/1/3/1/3/131380265/vaxokep.pdfIn PDF document text
    • http://gubixazolela.sportsontheweb.net/analytical_chemistry_notes_download.pdfIn PDF document text
    • https://ravojinukof.weebly.com/uploads/1/3/4/4/134476618/xuwifitewuwiza-zowumaregovuwig.pdfIn PDF document text
    • http://kisikevofe.iblogger.org/35580365972.pdfIn PDF document text
    • http://tubipegutadob.iblogger.org/barashada_naxwaha_carabiga.pdfIn PDF document text
    • http://xufuxenu.mypressonline.com/ponezu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379720/normal_60632c371e1f6.pdfIn PDF document text
    • http://sajogol.iblogger.org/what_soda_is_gluten_free.pdfIn PDF document text
    • https://witomoniwitu.weebly.com/uploads/1/3/5/3/135317652/dalen-duviwijejipe-tumulapuze-titumuribuwiseb.pdfIn PDF document text
    • https://mikatafa.weebly.com/uploads/1/3/1/3/131398449/fasajebinov_dexolekezum_jakav_fepofuvizijaz.pdfIn PDF document text
    • http://tanemazijafawin.medianewsonline.com/vawoxi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392877/normal_6015a99d8ddef.pdfIn PDF document text
    • https://wilexezixokesu.weebly.com/uploads/1/3/4/7/134764798/ee8ce0522e573.pdfIn PDF document text
    • http://zatutajijiti.getenjoyment.net/66346767434.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://zijiwaras.onlinewebshop.net/meaning_nature_and_scope_of_political_sociology.pdfIn PDF document text
    • http://gedapewubu.epizy.com/76148154645.pdfIn PDF document text
    • http://sujotoginejo.rf.gd/ssc_admit_card_2018_bihar.pdfIn PDF document text
    • http://jabejanaboz.atwebpages.com/monster_illuminessence_led_strip_mood_light_kit_instructions.pdfIn PDF document text
    • http://vofofoduwegakuv.rf.gd/firewall_software_free_for_windows_7.pdfIn PDF document text
    • http://wajiletum.epizy.com/26258523316.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_off0000eb39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB39 5084 bytes
SHA-256: c5f76b75fc701d4fa28f5819cef4b25a76fd093a137963c133a8c22e87192bba
font_01_sfnt_off0000fc64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC64 10236 bytes
SHA-256: eb4c93f38afcd03573c598b8a0b53b230e8a187d71bc58aaae88edf3187efa55
font_02_sfnt_off00011f78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F78 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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