Malicious PDF — malware analysis report

Static analysis result for SHA-256 364d49450de4fe51…

MALICIOUS

PDF

83.7 KB Created: 2021-04-07 04:31:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 03157100cafbef03ba791ad756bef668 SHA-1: 9d4f8df6f69316463ab290d32cb5358298cb0381 SHA-256: 364d49450de4fe51286551f0f7c3af6a15c88e01b507a260690e04f631016a02
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document body, though partially garbled, suggests a lure related to employment training, and the presence of numerous external links to other PDF files hosted on disposable domains strongly suggests a phishing or malware distribution campaign. No scripts were extracted from this sample, but the overall structure and external links point to a malicious document designed to trick users into visiting malicious sites or downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://lozipotod.ru/award?keyword=attestation+d+entr%25C3%25A9e+en+formation+pole+emploi+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4502511/normal_601004489d470.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474449/normal_60007d9ca57b6.pdfIn PDF document text
    • http://montana-media.com/southwest_airlines_pilot_uniform_shopynkgb.pdfIn PDF document text
    • http://trixy-matrix.space/y_si_quedamos_como_amigos_librodbvn0.pdfIn PDF document text
    • http://onlinesos.tech/power_book_2_ghost_season_2_castpncmy.pdfIn PDF document text
    • http://medyahanem.com/anti_stress_coloring_book_free5991k.pdfIn PDF document text
    • http://ledy66.net/660780008915nyw8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446765/normal_5fe33361d1cea.pdfIn PDF document text
    • http://pannochki-art.com/formato_carta_poder_para_imprimir6qyyt.pdfIn PDF document text
    • http://shtampshop.ru/nosasobelodolotafasonobq72r.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481695/normal_605a038ae91ef.pdfIn PDF document text
    • http://rmk4sale.xyz/83697492096xgm0d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387702/normal_5fcf5a061b0f0.pdfIn PDF document text
    • http://mynasert.online/zojufamoen0qn.pdfIn PDF document text
    • http://biweekamnf.com/kigugamewzv71.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://fec450ea-b80f-4746-b851-35139cc02de5.filesusr.com/ugd/53a83b_526d6f93524a4009bcd9f442544f6fa5.pdf?index=trueIn PDF document text
    • http://tomunipi.rf.gd/ralifakonadon.pdfIn PDF document text
    • http://lalatotusawedo.epizy.com/wetakikolana.pdfIn PDF document text
    • http://pizibopiro.epizy.com/hamilton_beach_toaster_oven_rotisserie_chicken.pdfIn PDF document text
    • http://mosamafinewa.rf.gd/psa_bartleby.pdfIn PDF document text
    • http://gibilumopujilot.epizy.com/24565619166.pdfIn PDF document text
    • https://dda5c79a-a75d-44d9-a006-48dec3bfe172.filesusr.com/ugd/115d6e_d271004129184ffaaea770a05d2ccb14.pdf?index=trueIn PDF document text
    • https://86cafecd-0af7-43e6-b578-14605c742a6c.filesusr.com/ugd/c4ddd0_c54aa6515f134aeab22bb352216e368b.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_off000104ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104CA 5316 bytes
SHA-256: 698dff9d51bc74ce1abc96e1091bf27b3a6c3310421a02c36404cf08431b4db8
font_01_sfnt_off00011685.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11685 12984 bytes
SHA-256: ee88e0591818cb080df4d73d2c22c3c4fe5592f52aa69f3b417134991dee393d