Malicious PDF — malware analysis report

Static analysis result for SHA-256 95ffc2844602106a…

MALICIOUS

PDF

84.1 KB Created: 2021-04-07 18:00:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e85fe3c925944d81103316572a18d902 SHA-1: ed3b92705bd75a48a1bcde1cfc4c6d39d9c670b7 SHA-256: 95ffc2844602106add5df4c95339be97ff643a5ddbaa0c8231b602b23e7300de
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The document body, though heavily obfuscated, contains text related to movie titles, and embedded URLs point to domains that are likely part of a link farm designed to redirect users. The presence of external URIs and the overall structure suggest a phishing attempt to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 5

  • 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
  • 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=el+hobbit+la+desolacion+de+smaug+pelicula+completa+espa%25C3%25B1ol
    • http://piwofoterif.sportsontheweb.net/elettronica_analogica_e_digitale.pdf
    • http://mosebuzixat.mywebcommunity.org/two_step_algebra_equations_worksheets.pdf
    • http://mimedilubaj.22web.org/35656950491.pdf
    • https://cdn-cms.f-static.net/uploads/4468534/normal_5fd28becc671e.pdf
    • https://cdn-cms.f-static.net/uploads/4392664/normal_603ed09d3c460.pdf
    • https://cdn-cms.f-static.net/uploads/4467589/normal_603e85b1d9d8b.pdf
    • https://static.s123-cdn-static.com/uploads/4451019/normal_5fdf591978c8c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://aa700e4b-9450-4a85-8b7e-8c92ffe47626.filesusr.com/ugd/de972d_a0a49d4a5c0143c7a2ca663fe44fc9b1.pdf?index=true
    • https://a540aa65-2eb1-4ac3-86d0-bf6a54daac96.filesusr.com/ugd/2d797c_11888020a3324a0296dce10605ce976c.pdf?index=true
    • https://s3.amazonaws.com/zonebon/frost_and_sullivan_reports.pdf
    • https://uploads.strikinglycdn.com/files/b45f9d6a-6480-4226-9390-6d8f9c9bccb2/the_night_manager_season_2_air_date.pdf
    • https://b1e6e3cd-24a2-426a-8b7d-e8f4bd81915b.filesusr.com/ugd/83e584_c7c1775bd125419ba8be4153a0df9482.pdf?index=true
    • http://pusapovewazigu.onlinewebshop.net/11879452118.pdf
    • https://uploads.strikinglycdn.com/files/ce9ccb5d-058b-4e6c-9946-2c9de1c29e9b/is_taco_bell_food_bad_for_you.pdf
    • http://vedixemalirugi.atwebpages.com/american_english_file_3_teacher_s_book_resuelto.pdf
    • https://uploads.strikinglycdn.com/files/f02c3400-1163-41c0-8bcb-59b997b7d3c3/keller_williams_ignite_session_10.pdf
    • http://poxugexi.epizy.com/how_to_start_learn_arabic.pdf
    • https://s3.amazonaws.com/vekodupiwarobi/how_much_is_bluebeam_for_ipad.pdf
    • https://s3.amazonaws.com/belopudevuzuza/atari_flashback_7_add_games.pdf
    • https://uploads.strikinglycdn.com/files/430a232c-5526-46df-8425-1d7b61ac7b22/cultural_psychology_heine_download.pdf
    • https://s3.amazonaws.com/tigewibejageju/47815328903.pdf
    • http://ruwozubusa.epizy.com/53202765463.pdf
    • https://s3.amazonaws.com/medaliwifufugel/ripisojanenilatirev.pdf
    • http://sanejiwobar.epizy.com/reported_speech_exercises_bachillerato.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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f336.bin
b29f9350a720d2da9dc50567d08c4a82684db1fcb28a47e3a5788345b392d808
pdf-font-stream PDF embedded font (sfnt) at offset 0xF336 6744 bytes
font_01_sfnt_off0001041b.bin
eff285f574a0293421a247b94a0f64a056d8ca88b7de05cfebe7e2ca6d33b973
pdf-font-stream PDF embedded font (sfnt) at offset 0x1041B 5700 bytes
font_02_sfnt_off00011718.bin
4303b4cca13c4d544906a157d1cc9fa2a4af48ba1c962394e0e37f7475fa1ea3
pdf-font-stream PDF embedded font (sfnt) at offset 0x11718 12376 bytes