Malicious PDF — malware analysis report

Static analysis result for SHA-256 3301cf71294d88b4…

MALICIOUS

PDF

116.3 KB Created: 2021-04-05 10:19:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7974c4e2b2d988255d892ea735d792a SHA-1: 21620c1de9c6d41b2664f73af34fef229f512292 SHA-256: 3301cf71294d88b4908826dd6c3fba70c616ecac1598abe0a3cd386a96300802
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are part of a link farm designed to direct users to potentially malicious websites. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and a high ML score further indicate malicious intent. The document body suggests a lure related to software downloads, likely to facilitate phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/wix?keyword=gmd+auto+hide+soft+keys+pro+apk
    • http://byseles.xyz/12296084118scb5i.pdf
    • https://todusoxi.weebly.com/uploads/1/3/3/9/133999566/bcf88a.pdf
    • https://kazobutuzag.weebly.com/uploads/1/3/1/1/131164075/podovosiji-kapomenagu.pdf
    • https://baboxubawuxi.weebly.com/uploads/1/3/4/6/134666135/jiwivo_ridega.pdf
    • https://cdn.sqhk.co/filemowa/ygihcib/13643815021.pdf
    • https://cdn.sqhk.co/batumozi/Yyicihg/autonics_panel_meter.pdf
    • https://bogagabav.weebly.com/uploads/1/3/5/3/135305267/latilivepuxenedete.pdf
    • https://cdn.sqhk.co/lupobikud/gP42Hih/20220200709.pdf
    • http://domavera.ru/whirlpool_edr3rxd1_everydrop_refrigerator_water_filter_3_1_packjey1k.pdf
    • https://cdn.sqhk.co/zoluxoni/gd8digR/carrom_rules_book.pdf
    • https://zatibuvox.weebly.com/uploads/1/3/0/7/130738619/4cbcfb7459.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/vesubodufisi/81196775499.pdf
    • https://s3.amazonaws.com/vuxalirudidel/whatsapp_for_windows_64_bit.pdf
    • https://s3.amazonaws.com/rizoli/best_free_chess_games.pdf
    • https://uploads.strikinglycdn.com/files/69b31288-afa8-4b98-a685-83845657e20e/how_much_do_dna_tests_cost_for_dogs.pdf
    • https://s3.amazonaws.com/sinamozagemoger/guruslodge_waec_answers_2018.pdf
    • https://s3.amazonaws.com/mutirexa/new_cheque_leaf_format.pdf
    • https://uploads.strikinglycdn.com/files/8135b5bf-fbef-4b92-845f-633658d38ba0/10151237040.pdf
    • https://s3.amazonaws.com/roxawo/notepad_plugins_manager.pdf
    • https://s3.amazonaws.com/tumasun/horizontal_boring_machine_manual.pdf
    • https://s3.amazonaws.com/kewakuko/is_project_x_based_on_real_life.pdf
    • https://uploads.strikinglycdn.com/files/ced4bcec-aa72-427b-8ce9-46017a5eba5d/the_collector_2009_full_movie_free_download.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018986.bin
8351ec0af52b211f63879b26f383609741b6da3c4209b2dff6c3ce14a5b98ede		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18986 5448 bytes
font_01_sfnt_off00019bee.bin
8c3da2a9dd60bda5233c0089197f171f3ddf1a3b9111c17063c342cd4e46ef6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19BEE 12080 bytes

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