Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cfc62270b2782d0…

MALICIOUS

PDF

87.4 KB Created: 2021-01-18 22:03:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 625c106c1114fe2202df98c20a50a177 SHA-1: 76daac98d4f54027b7507d27c6fee4ba87d4c430 SHA-256: 4cfc62270b2782d0bcbbda2e0f94b8667f561e8b2252fb2180dccc2cbf036c76
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically pointing to 'traffset.ru' and including a 'utm_term' parameter suggesting a phishing or malicious redirection context. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for linking to numerous PDF files, further supporting a malicious intent. ClamAV detection as 'Pdf.Phishing.Trojan' confirms the malicious nature.

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://traffset.ru/123?utm_term=rockdale+county+tax+assessor+search PDF link annotation
    • https://site-1184420.mozfiles.com/files/1184420/gesokeribapubidinexe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450731/normal_5febfb3cddd55.pdfIn PDF document text
    • https://cdn.sqhk.co/bajipugotox/jihZjhv/musobamotagoxivulolo.pdfIn PDF document text
    • https://cdn.sqhk.co/pesuxitum/ChjJgfG/mulegedukuforexumikez.pdfIn PDF document text
    • https://cdn.sqhk.co/sabepakofo/QigZhcX/51706246520.pdfIn PDF document text
    • https://site-1177862.mozfiles.com/files/1177862/29264558928.pdfIn PDF document text
    • https://cdn.sqhk.co/zururodi/ieTjcid/smart_financial_goals_acronym.pdfIn PDF document text
    • http://vodaxuf.iblogger.org/jazakowezi.pdfIn PDF document text
    • https://cdn.sqhk.co/ludibipimilu/hco5Phg/chinese_checkers_2_player_rules.pdfIn PDF document text
    • https://cdn.sqhk.co/fojufifef/gjicw2j/56154911810.pdfIn PDF document text
    • https://cdn.sqhk.co/ratufewebu/e08LibM/18355648952.pdfIn PDF document text
    • https://cdn.sqhk.co/nagigureti/VEhgFsI/soul_stone_simulator_how_to_get_stormbreaker.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zutibebasonuf.epizy.com/sentences_worksheets_high_school.pdfIn PDF document text
    • http://dekifovep.epizy.com/blank_world_political_map_free.pdfIn PDF document text
    • http://nefaped.epizy.com/sofajuxene.pdfIn PDF document text
    • http://nojubeweba.epizy.com/center_table_in_form_html.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_off000116c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116C8 5268 bytes
SHA-256: d6682a5cd683037db8c04fe17c5697d6fe57c08a2ce930d4870513ab057d522c
font_01_sfnt_off000128bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128BD 11908 bytes
SHA-256: 4023e76f67aa47dc3ff29dd403dedff4fcdf8a7e5aa2b0c282558939b68fdda2

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