Malicious PDF — malware analysis report

Static analysis result for SHA-256 46f83656b20695ca…

MALICIOUS

PDF

87.5 KB Created: 2021-03-28 18:50:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 90ef67b5d15a9aa84e2765cd6ab41277 SHA-1: 9f50d45423286b0336138f0330ea941390847753 SHA-256: 46f83656b20695ca1e1317870f8e0b9de1dda928fd69ef35de3587eeb582ddf5
176 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection scheme. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically a phishing or trojan distribution. While no scripts were directly extracted, the PDF structure and numerous external URLs point towards a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://soxebez.ru/wix?keyword=apk+keyboard+iphone
    • http://pevetune.66ghz.com/70058477903.pdf
    • https://cdn.sqhk.co/pixorikibam/4fsjbhh/97467307631.pdf
    • https://cdn.sqhk.co/junizafuzep/R4RD42b/ice_cream_recipe_cuisinart_chocolate.pdf
    • https://cdn.sqhk.co/xovikojux/ijhdjdK/19918735068.pdf
    • https://cdn.sqhk.co/nopawuwam/bniggiK/nails_at_home_near_me.pdf
    • https://static.s123-cdn-static.com/uploads/4455684/normal_5ff5124217ad8.pdf
    • https://cdn.sqhk.co/genopeno/cshejj0/6469850015.pdf
    • https://static.s123-cdn-static.com/uploads/4370987/normal_5fe1903039118.pdf
    • https://cdn-cms.f-static.net/uploads/4420029/normal_5fdc3edfd840e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zusewijoje.epizy.com/teri_akhiyon_ka_kajal_mp4_video.pdf
    • https://1cf095b7-1d29-4152-b82c-7733cf7ba0c7.filesusr.com/ugd/c1de29_9d94198d5f434ef99db6fb723efcd3be.pdf?index=true
    • https://s3.amazonaws.com/gasodamuza/baghban_rab_hai_baghban_song_djpunjab.pdf
    • http://koxosam.rf.gd/allu_arjun_daughter_photos.pdf
    • https://351e5f87-f9e5-4015-92cd-d601692b9ec3.filesusr.com/ugd/a0d0d3_26ff114919ea4501932698ec2e3c2d38.pdf?index=true
    • https://s3.amazonaws.com/panalipolifod/all_of_me_piano_cover_sheet_music.pdf
    • https://425e2ee7-996f-4c6d-a593-b44a2a39b733.filesusr.com/ugd/bb05c1_1b820017300b4a88889113455f256d2b.pdf?index=true
    • http://rozogev.rf.gd/wuferotasoxepawix.pdf
    • https://s3.amazonaws.com/jidosatikim/nadixudenux.pdf
    • https://s3.amazonaws.com/jedobufudajewu/how_to_clean_paraffin_wax_heater.pdf
    • https://s3.amazonaws.com/fefurorobumi/amaravathi_tamil_film_songs_free.pdf
    • https://748e6e98-33e2-4bd1-95aa-01ea3505a154.filesusr.com/ugd/704f6c_ba9d5225f15c49d0a1743b13ce0e7458.pdf?index=true
    • https://s3.amazonaws.com/bubisifapagefe/agario_2._7._0_apk.pdf
    • https://s3.amazonaws.com/pokorevalaxex/14586338821.pdf
    • http://tezebidurob.epizy.com/98817448226.pdf
    • https://s3.amazonaws.com/wutogugej/zutafugik.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f39a.bin
2ce5a7286efefc5aae27ce1c31b3347e159d00bd30cf97f509a0b7f7d49caffb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF39A 6440 bytes
font_01_sfnt_off0001038f.bin
d9d628f6bf1eee56daa83e01e16dae1339b60e2d1b93f53518db47ee6fdd7f3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1038F 5132 bytes
font_02_sfnt_off00011500.bin
d44dd0701d0a507e85c92401cefcd532ad26a8b2d3bf7fc71920a3b3b2a389c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11500 11320 bytes
font_03_sfnt_off00013b35.bin
35d3440dae1ebc896564e4e6f70ea95aa3a30a1ac603c7fffbb21b68b8b72e2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13B35 16036 bytes

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