Malicious PDF — malware analysis report

Static analysis result for SHA-256 85b29a6553601223…

MALICIOUS

PDF

69.8 KB Created: 2021-03-29 15:14:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 4b49c3e63b6a8add4e83f0c2b7659270 SHA-1: 2ff12f7f294324fe09e3e2f8243c4d311734d786 SHA-256: 85b29a65536012239d58e21a1f1445c6348d5c2423623fa14d73c5ddbb573860
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs, with a primary suspicious URL being https://leonvi.ru/strik?utm_term=white+tiger+pictures%25EF%25BF%25BC, which is likely part of a phishing or redirection scheme. The document body, though heavily obfuscated, suggests a lure related to "white tiger pictures", aiming to trick users into visiting the malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/strik?utm_term=white+tiger+pictures%25EF%25BF%25BC PDF link annotation
    • http://karaulovlife.site/supply_chain_management_systems_includewbec2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414852/normal_6002edd440bad.pdfIn PDF document text
    • http://tarekupi.scienceontheweb.net/6716355342.pdfIn PDF document text
    • http://leyloften.online/guvititemanatoterzenz5.pdfIn PDF document text
    • http://newberginvestmentproperty.com/10899775077xnupp.pdfIn PDF document text
    • http://trokot-tonirovka.online/659093272334kra4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503874/normal_6042d493247a0.pdfIn PDF document text
    • http://justamorem.com/can_you_ever_enter_gerudo_town_as_a_manc7x68.pdfIn PDF document text
    • http://rerubin.space/36919923215s8zls.pdfIn PDF document text
    • http://henrysavbr.site/rutufoxabajibd88.pdfIn PDF document text
    • http://italy-small.space/ashton_kutcher_and_mila_kunis_wedding_picturesj7ix4.pdfIn PDF document text
    • http://podipotekoi.ru/batman_arkham_knight_all_riddlesxijwx.pdfIn PDF document text
    • http://manibupefif.mypressonline.com/18110515770.pdfIn PDF document text
    • http://vobalemujumojak.mywebcommunity.org/how_do_you_fill_up_a_brita_water_bottle.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451033/normal_602adf3fc7e95.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459322/normal_5fcd8b3130d6b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c76a08a-0cb1-4ab0-b197-d7b34974fe6c/10845733595.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/android_studio_masterclass.pdfIn PDF document text
    • https://s3.amazonaws.com/zizene/plural_possessive_noun_worksheet_3rd_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8500c47-351b-4faa-a837-6da2f8e4c8cd/79443718164.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b3fef12-3b4f-4567-bc77-9d975adeb817/hopper_3_connection_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcd0d290-6981-44b3-8d87-7aa261eec811/zeladefutazojobulaput.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47a3aa3b-1c17-46cd-958c-8417543939dd/jufof.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_off0000d2b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2B2 4972 bytes
SHA-256: 7e226879526337613fe92643ae9c1c335a4caf9fb54a09f889083d7a2fda95d8
font_01_sfnt_off0000e3b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B9 11060 bytes
SHA-256: 7cc0731962ff9bdeeae8ef503729bc2f1bc4f62ebcfe14d21d80ddf392014fe2