Malicious PDF — malware analysis report

Static analysis result for SHA-256 e742742a07084834…

MALICIOUS

PDF

80.6 KB Created: 2021-06-01 11:00:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fc9355244888a0347a4c74ff1fee0fc4 SHA-1: 792aa53ed146882b76a188cfb9bd06dc16576fa4 SHA-256: e742742a07084834fae922f061fa977293ae48e679cfcb791083792ca9c53d28
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs, with one prominent URL pointing to 'huntic.ru' and another to a link farm hosted on 'pbworks.com'. The presence of a link farm and the high number of external URIs suggest an attempt to redirect users to potentially malicious sites for phishing or further exploitation. No scripts were extracted, but the PDF structure and embedded links are indicative of a phishing or content-luring attack.

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://huntic.ru/pbw?utm_term=king%2527s+raid+-+dark+kasel+guide
    • https://static.s123-cdn-static-d.com/uploads/4480161/normal_60afefaf6573c.pdf
    • https://galifejamadex.weebly.com/uploads/1/3/0/8/130814644/229740.pdf
    • https://vafoguvisijun.weebly.com/uploads/1/3/4/8/134887412/dogodovuzun.pdf
    • https://static.s123-cdn-static.com/uploads/4382962/normal_5ff0e5decaadb.pdf
    • https://nonesuwenuvav.weebly.com/uploads/1/3/4/4/134400251/8793777.pdf
    • https://rigepapesoruzu.weebly.com/uploads/1/3/4/5/134519565/kokarebaxobokise.pdf
    • https://cdn-cms.f-static.net/uploads/4380078/normal_60647ffbced01.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://funinupun.pbworks.com/w/file/fetch/144418392/xidunozitoxese.pdf
    • http://ruwomodanom.pbworks.com/w/file/fetch/144445449/que_esperar_cuando_se_esta_esperando_pelicula_completa_espaol_latino.pdf
    • http://gazumadu.pbworks.com/w/file/fetch/144442320/98908564200.pdf
    • http://taxexuwej.pbworks.com/w/file/fetch/144434709/dakog.pdf
    • http://povelin.pbworks.com/w/file/fetch/144420213/89658192160.pdf
    • http://zelovoguvunu.pbworks.com/f/ver_tres_veces_tu_3msc_pelicula_completa_en_espaol_latino.pdf
    • http://wixugigir.pbworks.com/f/fma_and_football_worksheet_answers.pdf
    • http://niwomif.pbworks.com/f/working_principle_of_submersible_pump.pdf
    • http://ruwezebom.pbworks.com/f/best_pellets_for_crosman_760.pdf
    • http://pagorevet.pbworks.com/w/file/fetch/144448290/89836304670.pdf
    • http://tazijebep.pbworks.com/f/77806212844.pdf
    • http://jujirafamena.pbworks.com/f/munewuruxore.pdf
    • http://zalonuzojeru.pbworks.com/w/file/fetch/144450456/shaolin_soccer_english_dub_free_download.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e72a.bin
a94a19ba311db1a3079570933300dd0e683bdbdc93cdffc3f7bf6be5e2fe1f68		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE72A 5092 bytes
font_01_sfnt_off0000f89c.bin
bfc8236c60a50d18d33b4b6670790aee43d75f79be7a7f98f9026b9e38728179		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF89C 11156 bytes
font_02_sfnt_off00011ec0.bin
bb4620ae2308066493f479cb0495314a41e91f5b0bfb2a754d9bad2ef34af03d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11EC0 16060 bytes

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