Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0c0e4927501f4f8…

MALICIOUS

PDF

73.4 KB Created: 2021-03-11 13:10:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: adf498d023ea317bf26e6a15164f8ca5 SHA-1: 03b5cb8d93525124ce557a4f586f632ab8703763 SHA-256: b0c0e4927501f4f867ce59689dc7dc6e429a292e863c4836e9378d7f23d31c0a
124 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, indicating a phishing or trojan payload. It contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of PDF_URI and EMBEDDED_URL heuristics further supports the attack pattern of luring users through deceptive content to external, potentially malicious, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7529

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://xezojetit.ru/award?keyword=ansys+fluent+tutorial+book+pdf PDF link annotation
    • http://tujubafi.getenjoyment.net/tewurulesi.pdfIn PDF document text
    • http://kazexezawulozij.mypressonline.com/use_itunes_to_restore_ipod_nano_6th_gen.pdfIn PDF document text
    • http://raxejudesezix.scienceontheweb.net/28819655706.pdfIn PDF document text
    • http://gimatadokij.mygamesonline.org/netgear_dgn2200_setup.pdfIn PDF document text
    • http://fojukivijivik.medianewsonline.com/why_use_text_features.pdfIn PDF document text
    • http://aycotoro6.xyz/93666400170vdyy2.pdfIn PDF document text
    • http://collegegraduatecentraldating.com/samsung_note_20_ultra_technische_datengexs4.pdfIn PDF document text
    • http://zoguponuwuxoli.medianewsonline.com/pengertian_anecdotal_record.pdfIn PDF document text
    • http://wufamega.scienceontheweb.net/titemepoxetidabevojawo.pdfIn PDF document text
    • https://cdn.sqhk.co/wipedekis/gbijjja/rocket_launch_live_stream_fortnite.pdfIn PDF document text
    • http://jujovobima.getenjoyment.net/where_to_buy_bradley_smoker_parts.pdfIn PDF document text
    • http://powajaxib.medianewsonline.com/66012280876.pdfIn PDF document text
    • https://cdn.sqhk.co/pifonode/mhghjga/old_man_s_journey_review_gamespot.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://72b50e20-f79f-40ca-96b4-24bef83e308f.filesusr.com/ugd/1a1092_c3c87496b00c4f25ad14228980f137c7.pdf?index=trueIn PDF document text
    • http://popofisofol.myartsonline.com/penenukadunivajarevodowuv.pdfIn PDF document text
    • http://tuxabatadifu.onlinewebshop.net/ncert_ancient_history_notes.pdfIn PDF document text
    • https://9b321a86-0615-40a7-b684-6dced782f4cc.filesusr.com/ugd/e3cae3_2690d5bb1e6343a1b4a3bd1eb45f51be.pdf?index=trueIn PDF document text
    • http://jikelaxapexa.onlinewebshop.net/1391482238.pdfIn PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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_off0000f4ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4ED 6744 bytes
SHA-256: b29f9350a720d2da9dc50567d08c4a82684db1fcb28a47e3a5788345b392d808
font_01_sfnt_off000105d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105D2 5332 bytes
SHA-256: 7ce8c4acbbd37db5fb99e1c1fd29ec0b341705d2238d9b9d405c38f32be61da7

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