Malicious PDF — malware analysis report

Static analysis result for SHA-256 047e463c30d4dbc1…

MALICIOUS

PDF

82.6 KB Created: 2021-04-06 20:57:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 505312d6ffc60e131fb2264465c1728a SHA-1: 98dbfd36c59e29f8186ede720445cd0579252887 SHA-256: 047e463c30d4dbc13c8379f3786e80373f7fbf29fa197d7cc229b2d67a74dc12
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URLs, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though partially corrupted, contains text related to definitions and application metadata, which likely serves as a lure to disguise the malicious intent of directing users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://pelibifir.ru/strik?utm_term=simple+definition+of+enthalpy+change+of+neutralisation PDF link annotation
    • https://nebolizeluxofid.weebly.com/uploads/1/3/0/8/130874408/fe73ea8f1.pdfIn PDF document text
    • http://ourfutures.space/download_subway_princess_runner_java_gamenup36.pdfIn PDF document text
    • http://tameeniraq.com/que_es_picaporte_de_la_puertaeap2e.pdfIn PDF document text
    • http://fbdirect.site/58823819752yf9jf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459628/normal_604843a8b960c.pdfIn PDF document text
    • http://fb-pageunderreview.com/world_at_arms_gamel76xn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470982/normal_5fcaa1b62e553.pdfIn PDF document text
    • https://nodifolosorak.weebly.com/uploads/1/3/4/7/134758422/tasisivawuxofonomozi.pdfIn PDF document text
    • http://rocketdocs.us/zuvatimidozepunajezimener6y728.pdfIn PDF document text
    • http://stankovit.ru/how_to_get_a_free_immigration_lawyer5esud.pdfIn PDF document text
    • http://pressit.space/85345664759z0v6y.pdfIn PDF document text
    • http://evatopshop.xyz/comprehension_worksheets_for_2nd_gradex4dh6.pdfIn PDF document text
    • http://elinekici.online/popumuxovesegomonivufpxc4.pdfIn PDF document text
    • http://rewita.fun/sony_bdp-s590_lockedllhue.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463264/normal_6005268acbc6d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388060/normal_601061f3a5d8c.pdfIn PDF document text
    • http://abwaab.su/illuminated_manuscript_font_generatorjyati.pdfIn PDF document text
    • http://espacecmb.xyz/molisirama3f.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zukogi/87071242619.pdfIn PDF document text
    • https://s3.amazonaws.com/bidurudilidujug/how_do_i_connect_my_canon_mg3600_printer_to_my_computer.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f920.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF920 1560 bytes
SHA-256: 3480c55784b56b30103e7ce104023669119397bb16b4866b09a90a8ad0bb0338
font_01_sfnt_off0001011d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1011D 5776 bytes
SHA-256: 6c2bd5c1dd68f359b732a3840302534f75b6dbad7b41fd8b489de74c99ff9ad1
font_02_sfnt_off000114a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114A6 11616 bytes
SHA-256: 214f68bcd12b58c490c308efe0139c5cc88f50dc7af267078727e03882c1c8ba

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