Malicious PDF — malware analysis report

Static analysis result for SHA-256 477067552ec0c7ba…

MALICIOUS

PDF

89.6 KB Created: 2021-04-04 08:43:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 3c9d743d2325ede39799b2ae099e5d03 SHA-1: e4ac01c74837d35be3b008d962e76cf207ef38a9 SHA-256: 477067552ec0c7ba37a65e57e243049db1e036524c28024e750df9854bbbff40
126 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on disposable domains and appear to be part of a link farm. The primary URL, 'https://soxebez.ru/strik?utm_term=how+much+does+an+appliance+service+call+cost', is presented as information about appliance service costs, likely as a lure. ClamAV and ML classifiers strongly indicate malicious intent, consistent with phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://soxebez.ru/strik?utm_term=how+much+does+an+appliance+service+call+cost PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4466996/normal_6039bed45c58b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388835/normal_5fc7c3b136247.pdfIn PDF document text
    • http://moderivapotilos.22web.org/kilumowigurokure.pdfIn PDF document text
    • http://boldly-grow.com/baxobilukudavorewuditrmvqi.pdfIn PDF document text
    • http://rozel.ru/spectra_s1_vs_medela_pump_in_stylesxqus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496816/normal_601c790d9112e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412593/normal_5feb265dcd8b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460446/normal_60650a8becb91.pdfIn PDF document text
    • http://damvglaz0.xyz/odd_eyes_arc_pendulum_dragon_priceshpss.pdfIn PDF document text
    • http://songkfrk.site/renaissance_periodization_vegan_template_review85cox.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470223/normal_5fcf387bf2f27.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471253/normal_603cce8115023.pdfIn PDF document text
    • http://fepefamegutasoz.iblogger.org/what_are_the_responsibilities_of_csr.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://danidagibi.epizy.com/who_can_administer_woodcock_johnson.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bde0b6dd-fa5c-44d5-b785-a985a3e16d14/mcgraw_hill_3rd_grade_math_answers.pdfIn PDF document text
    • http://famuxixisuxu.rf.gd/what_company_owns_epic_software.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/449ec0ed-67a7-40fc-9940-65a90fa0280a/thermo_king_ts_200_alarm_codes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23abc983-b0f1-496a-b9cb-79c758b9ad8f/snowbear_utility_trailer_specs.pdfIn PDF document text
    • https://ebc1add8-0b9d-418e-9e4a-1e287827e933.filesusr.com/ugd/ab63e3_37838041b3b743ebb2202d980d0dad14.pdf?index=trueIn PDF document text
    • https://2978fa49-077f-489e-bef2-0e177375ffd3.filesusr.com/ugd/50ba8f_8d06365b48154ef48db15967a99df03c.pdf?index=trueIn 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_off0001204b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1204B 5424 bytes
SHA-256: 9e4bb15438f853f569a7ab1c551cd091edced2001bef5627c5107bbdf9f84e63
font_01_sfnt_off000132a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132A7 11292 bytes
SHA-256: 2fbf1c3c3d0daaab7ff0932942fd023e5431d5b20ef6f487c0b0078dc1d9589c

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