Malicious PDF — malware analysis report

Static analysis result for SHA-256 0000b2192c23afaf…

MALICIOUS

PDF

81.9 KB Created: 2021-03-16 23:15:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 483711f5736e6a780eea42ebaa0ead11 SHA-1: 6f94ab21c992acbb67290a61152588451cc17c4f SHA-256: 0000b2192c23afaf64bfe0b81b7a61675726381a6754b602d14ac7c79ed4933c
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The embedded URL 'https://jacksth.ru/wix?keyword=persona+4+ayane+location' is likely intended to redirect users to malicious content or further phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jacksth.ru/wix?keyword=persona+4+ayane+location
    • https://bolubevegu.weebly.com/uploads/1/3/1/4/131454373/8819495.pdf
    • http://zedateve.mypressonline.com/degenerative_diseases_of_the_nervous_system.pdf
    • https://raponomipa.weebly.com/uploads/1/3/2/6/132681826/fe6488f56725245.pdf
    • http://ompala.store/kerexisugu443r4.pdf
    • http://libutulidux.medianewsonline.com/cyrus_beck_line_clipping_algorithm_in_computer_graphics.pdf
    • https://lanekugufer.weebly.com/uploads/1/3/5/3/135351315/3620567.pdf
    • http://fasekafalig.scienceontheweb.net/hoveround_mpv5_battery_charger.pdf
    • http://micrometer25bill.site/budget_spreadsheet_neil_rothmanqvw36.pdf
    • http://prizinsta365.website/kenmore_elite_he4_dryer_manualaocl2.pdf
    • http://avto-trokot.xyz/revitosaxapesirolat0t4z9.pdf
    • http://jedunoba.iblogger.org/learn_quran_online_free_english.pdf
    • http://zotikarida.medianewsonline.com/bikez.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/benuka/46389833747.pdf
    • https://43a2ba88-5de9-465b-b95f-6a4d82f2d06e.filesusr.com/ugd/dcbeda_88e07204f32a4bb5acb5417590017947.pdf?index=true
    • https://73c25812-7308-4b32-b985-10e2a25710ca.filesusr.com/ugd/5b604d_3861af86a711499f9c27b7d0ab495de1.pdf?index=true
    • https://s3.amazonaws.com/nuselufuzo/chsl_2019_form_fee.pdf
    • http://rumakepalo.rf.gd/alpha_thalassemia_pregnancy_guideline.pdf
    • https://f6b99bba-f064-431f-ab68-6eacb91b2703.filesusr.com/ugd/35e1ce_5dda0266230f41b5bc19689fc6a32c8f.pdf?index=true
    • https://s3.amazonaws.com/rurosaveruk/common_noun_and_proper_noun_examples.pdf
    • http://kivozusemu.atwebpages.com/what_is_a_paragraph_proof.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1cd.bin
af4dcbed3553f3d7197a1775ab175abed0e0c00604e2d6cc8f69f61123de0328		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1CD 5020 bytes
font_01_sfnt_off00010333.bin
d1a4076865f248cafbf1554854d99014f23535e134b8462f3921b3377c1cf1bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10333 4984 bytes
font_02_sfnt_off00011441.bin
ac3cf1c99aad286d04c2670759f0282d1512149bf501929616ccea768f854896		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11441 11236 bytes

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