Malicious PDF — malware analysis report

Static analysis result for SHA-256 564fd4171a11279f…

MALICIOUS

PDF

84.4 KB Created: 2021-04-03 03:51:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3850d20d35f597a4cc4d9b5844c4efed SHA-1: b76450edfd3d30496e63da249b881a19cc1db57b SHA-256: 564fd4171a11279f0ca50448cc1c6af8b57f7fa7cf92302077572fed6b266e96
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to PDF files, suggesting a link farm or a method to distribute further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. The presence of embedded URLs and the overall structure point towards an attempt to trick users into visiting malicious sites or downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://golowaki.ru/123?utm_term=google+docs+drive++halo
    • http://salimom.mygamesonline.org/dozubirodiw.pdf
    • http://fiwogozugoxiget.22web.org/devuzobuteronidejatumot.pdf
    • http://betixisu.22web.org/javudebibugowopeto.pdf
    • https://cdn.sqhk.co/giruzegovu/1Sq47z6/4th_inning_conquest_map_mlb_the_show_20.pdf
    • https://cdn.sqhk.co/madagijoj/bEjhggv/lock_screen_wallpaper_dont_touch_my_phone.pdf
    • http://dikuziropuviv.22web.org/ge_headlight_bulb_replacement_guide.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://ca3ec1ac-6ff7-4c8f-ae0f-86a30d86e335.filesusr.com/ugd/3615fb_c48e5c536ce748c886aec320458b4f04.pdf?index=true
    • https://uploads.strikinglycdn.com/files/1c732dcd-42e4-4156-8302-70cc381ea8e7/south_carolina_driver_license_validity.pdf
    • https://601bead5-a720-4f65-98db-62fe2a42cb91.filesusr.com/ugd/0e52b4_fdf41ff914ad4ce7a802ba6229de5319.pdf?index=true
    • https://uploads.strikinglycdn.com/files/eddcd60e-17f5-454c-8498-dd6118fa9611/long_john_silver_nutrition_info.pdf
    • https://9169454a-6e45-4b39-89c4-5cd9bf0a6084.filesusr.com/ugd/32fbc8_85a5472dc07a4a5cb87f6109013b055e.pdf?index=true
    • https://uploads.strikinglycdn.com/files/632fc6b9-1d89-4193-b9b5-c6227dead651/the_cake_bible_reviews.pdf
    • https://uploads.strikinglycdn.com/files/e2afe5fe-57a2-41a8-b9a2-7cf7767ddf66/salter_disc_electronic_kitchen_scale_manual.pdf
    • https://a84030a7-2e48-4039-807a-383e2b7216cc.filesusr.com/ugd/c5d40f_7bd6a140234b4ea2addbe59c2e582f48.pdf?index=true
    • https://uploads.strikinglycdn.com/files/355cf9db-90de-4c36-b711-79eb932b6c57/venkateswara_swamy_govinda_namalu_telugu_lyrics.pdf
    • https://uploads.strikinglycdn.com/files/70907609-1597-4926-b036-27bc84e46375/how_much_does_the_new_yorker_pay_for_cartoons.pdf
    • http://rizinesuri.epizy.com/kuputixux.pdf
    • https://uploads.strikinglycdn.com/files/00690dad-c3f4-4411-87ba-08a9f35b5c49/wurexotenivineb.pdf
    • http://legokejapo.atwebpages.com/beps_action_4_final_report.pdf
    • http://xaxuvep.epizy.com/redotupeni.pdf
    • https://b6f97e74-198a-461d-a312-d71b9712332b.filesusr.com/ugd/a2d007_50ec3ba5c6c44cc5bb5650b1b55d5867.pdf?index=true
    • 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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7da.bin
70df47cf00bda4c07e0df09e043d0e52f4b6d9074e89b33e6bfdc17f4869d5f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7DA 5292 bytes
font_01_sfnt_off000109df.bin
24da0909e8f562573fed0f883031a76b12b972ba09d49918448e6f434a115140		 pdf-font-stream PDF embedded font (sfnt) at offset 0x109DF 10612 bytes
font_02_sfnt_off00012e7e.bin
a4f616c8ed03231f927c8f6725ddfb6aed79ba1e9c0c9257d690ec40f184d4cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E7E 16388 bytes

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