Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2427dece60a47e1…

MALICIOUS

PDF

76.8 KB Created: 2021-04-07 08:27:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c9e4686c9d3798320dd6a70377514ddf SHA-1: 70d739f5e5e47d63d2ebc842095f1bb156b20bba SHA-256: b2427dece60a47e174ab0ef4be9cc5c022eea70e94ab67a3756d072350146b89
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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 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.
  • 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://fokemale.ru/strik?utm_term=how+to+eject+disc+from+ps3 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4405186/normal_6058747ca3201.pdfIn PDF document text
    • https://cdn.sqhk.co/musezikuzapi/WWobWgd/55398576529.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470391/normal_5fe5e54c14c6a.pdfIn PDF document text
    • https://lurakowufo.weebly.com/uploads/1/3/4/4/134457973/kovaserodevuvux_fovesa_jaxuselezagak_xerojezafem.pdfIn PDF document text
    • https://cdn.sqhk.co/gomiwopizi/WqUHPjh/galaxy_sky_shooting_unlimited_game_download.pdfIn PDF document text
    • https://vojisijekedix.weebly.com/uploads/1/3/5/3/135311469/3841904.pdfIn PDF document text
    • https://cdn.sqhk.co/bebiwamulanu/lhhPghi/lebagobuputokibusenif.pdfIn PDF document text
    • https://cdn.sqhk.co/vuxesojogugu/hajg1AZ/top_hashtags_on_instagram_for_artists.pdfIn PDF document text
    • https://cdn.sqhk.co/tugirujozi/dhigcUZ/dawson_s_creek_series_6_episode_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/felolavap/igggjjI/28171494359.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375350/normal_603e6fcb29b96.pdfIn PDF document text
    • https://cdn.sqhk.co/guxudakakali/CHgiOhi/supercheap_transmission_oil_cooler.pdfIn PDF document text
    • https://legovizadedugid.weebly.com/uploads/1/3/1/8/131856283/lojonir.pdfIn PDF document text
    • https://tewutenuka.weebly.com/uploads/1/3/2/6/132695339/3588819.pdfIn PDF document text
    • https://cdn.sqhk.co/tapuvimixaxo/fPgdNie/toca_life_hospital_free_download_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/gonolesuzam/jhvnjdB/muboribuge.pdfIn PDF document text
    • https://cdn.sqhk.co/nixivezez/7iijaia/2542183101.pdfIn PDF document text
    • https://cdn.sqhk.co/fegukajebaj/cY0gdX7/55960618691.pdfIn PDF document text
    • https://cdn.sqhk.co/pugirunosamo/bldPzXz/36191370450.pdfIn PDF document text
    • http://xivixevikid.iblogger.org/bemobapegabokadasux.pdfIn PDF document text
    • https://cdn.sqhk.co/dajebala/hdhcgdk/jeans_movie_songs_ringtones_telugu.pdfIn PDF document text
    • http://porufune.iblogger.org/convert_base64_string_to_javascript.pdfIn PDF document text
    • https://cdn.sqhk.co/zinoliwomi/MxHieox/1284074083.pdfIn PDF document text
    • https://jaweditulopo.weebly.com/uploads/1/3/4/3/134313576/nedemew.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://navaradevopam.epizy.com/jojesunivulubawibiv.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_off0000ed8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED8A 5352 bytes
SHA-256: 5f8768c9bfe0a57403982468efefcb47987a88b7ab92d8bbeb8b240f719cab26
font_01_sfnt_off0000ffc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC2 11188 bytes
SHA-256: 45a7397ae0d5de01bbd68af4770a603fe3b726fbf9177ee089d50e7375e8e3cd