Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9b590264e9bf9ba…

MALICIOUS

PDF

62.0 KB Created: 2021-02-07 20:01:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 06a6886396539ae6f84c3818c5206ad7 SHA-1: a8513fe22accee49d424e95af5958ac87944c15b SHA-256: f9b590264e9bf9ba5072830af2e6d9112694059549b5ee81d8f71c1a6ec5f58d
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs, many pointing to disposable hosting or suspicious domains, suggesting a phishing or malware distribution scheme. The presence of PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports this, indicating the document is designed to redirect users to external malicious 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://druttle.ru/wb?keyword=damansara%20realty%20berhad%20annual%20report PDF link annotation
    • https://cdn.sqhk.co/nudizodi/MpVJhjz/onkyo_hf_player_vs_neutron.pdfIn PDF document text
    • https://cdn.sqhk.co/gugosobor/jfHgdke/minecraft_free_game_download_hiapphere.pdfIn PDF document text
    • http://tevajevidiwa.22web.org/south_platte_cheesman_canyon_fishing_report.pdfIn PDF document text
    • https://mixusabap.weebly.com/uploads/1/3/4/0/134096097/885c9.pdfIn PDF document text
    • https://cdn.sqhk.co/nugopanage/iigc7hd/meaning_of_constitutional_democracy_in_history.pdfIn PDF document text
    • https://lepatoketi.weebly.com/uploads/1/3/4/7/134732542/56456154687cd.pdfIn PDF document text
    • https://gedesinikus.weebly.com/uploads/1/3/5/3/135323437/pexufu-nifipatiranewov-sovokekatunebi.pdfIn PDF document text
    • https://zuseluxutiv.weebly.com/uploads/1/3/4/6/134686448/jededakegugap.pdfIn PDF document text
    • https://cdn.sqhk.co/pujapipiwat/7tKyjge/super_smash_bros_ultimate_dlc_wish_list.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pegamivefeja.rf.gd/lizesigu.pdfIn PDF document text
    • http://nolagevupuxuje.epizy.com/sezowirafulanobuwupepo.pdfIn PDF document text
    • http://gatapin.rf.gd/gana_baja_de_punjabi_song.pdfIn PDF document text
    • http://zifawikixeliba.epizy.com/wetorodiwixe.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/65144906499.pdfIn PDF document text
    • http://repibikapowa.epizy.com/19544358500.pdfIn PDF document text
    • http://lafatakijuton.epizy.com/80952002587.pdfIn PDF document text
    • http://tonezifimoraga.epizy.com/luton_guided_busway_route_map.pdfIn PDF document text
    • http://furofazitogo.epizy.com/allstate_pip_application_form.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b5ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5EA 5440 bytes
SHA-256: 51e05c92e9bda424855bc088475157563da1637d031272446dd35807079872ce
font_01_sfnt_off0000c841.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC841 10148 bytes
SHA-256: 5a67e61febe5b510f929e5da37528862bff0f4e0526cb8c75b035e156b0e812b

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