Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fe372d6e58fba0d…

MALICIOUS

PDF

80.3 KB Created: 2021-03-28 14:51:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 06ef3c838787d34e290ed0b53c8d1bbb SHA-1: 45b644a7dd083573068bb03bfb3897de07867dde SHA-256: 8fe372d6e58fba0da61cc8f9800b6492127faa88c93137775092202adaaed104
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users. The primary URL, 'https://xezojetit.ru/strik?utm_term=how+to+install+coleman+saluspa', indicates a potential lure related to product installation, likely leading to phishing or malware. ClamAV and ML classifiers also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://xezojetit.ru/strik?utm_term=how+to+install+coleman+saluspa PDF link annotation
    • https://kijapipova.weebly.com/uploads/1/3/1/4/131407887/jeroxos_lamazibe_tokavopi.pdfIn PDF document text
    • https://rofoxanubojinud.weebly.com/uploads/1/3/2/7/132740779/270acccecec8.pdfIn PDF document text
    • https://cdn.sqhk.co/sezabaxo/jaidyih/cash_app_customer_support_telephone_number.pdfIn PDF document text
    • https://mafizawejibon.weebly.com/uploads/1/3/1/3/131383772/6435200.pdfIn PDF document text
    • https://risibazizugati.weebly.com/uploads/1/3/4/7/134710005/mizekos.pdfIn PDF document text
    • https://cdn.sqhk.co/muzolorakow/ijbziiu/texas_unclaimed_property_reporting_2020.pdfIn PDF document text
    • https://ganepivojo.weebly.com/uploads/1/3/4/7/134774155/2561c071c74.pdfIn PDF document text
    • https://cdn.sqhk.co/linotepibubi/jqfGhh5/winky_lux_lip_balm_rainbow.pdfIn PDF document text
    • https://cdn.sqhk.co/nesixepo/dibhihg/cdp_protocol_packet_format.pdfIn PDF document text
    • https://nomomiwadij.weebly.com/uploads/1/3/3/9/133997716/bijaxebelitumetirov.pdfIn PDF document text
    • https://cdn.sqhk.co/puwonereb/0idgcHM/braveland_wizard_talent_tree.pdfIn PDF document text
    • https://cdn.sqhk.co/dijogiper/dCyhbic/security_craft_mod_showcase.pdfIn PDF document text
    • https://cdn.sqhk.co/vubenexew/k1WYuUd/learn_office_365_administration.pdfIn PDF document text
    • https://cdn.sqhk.co/gabadifofibo/hcnPgjQ/imposter_sound_effect_among_us.pdfIn PDF document text
    • https://gisijenoxumo.weebly.com/uploads/1/3/1/4/131437849/fadivazox.pdfIn PDF document text
    • https://cdn.sqhk.co/bopelara/ceihib5/gorillaz_songs_lyrics.pdfIn PDF document text
    • https://cdn.sqhk.co/temejikowewa/Ryhhaih/kukejor.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/27607616989.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/5948750490.pdfIn PDF document text
    • https://s3.amazonaws.com/dakebesuvum/74806594004.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/nalikafo.pdfIn PDF document text
    • https://s3.amazonaws.com/nasitevu/diabolik_lovers_game.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_off0000fa4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA4C 5036 bytes
SHA-256: 785cdf2b184c60134499848365f3ac8e6e909f75c0803aa3ca4b132df51edda0
font_01_sfnt_off00010b6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B6D 11464 bytes
SHA-256: d0be70b1cb2f6219230a0acc457772993d8cb509247b21dbb4c95faa84636ecd