Malicious PDF — malware analysis report

Static analysis result for SHA-256 6043e83175c92530…

MALICIOUS

PDF

77.2 KB Created: 2021-04-08 00:06:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e07c071c834d4857760bac897b3f7b05 SHA-1: 94e7430bcc2faf1da8ac0bc1edc266f9ada204cd SHA-256: 6043e83175c925300f6e5d76fc2289bf3b3c7f02d150538e1f9eed84518b772a
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an external URI pointing to a suspicious domain, which is likely the primary lure. The document body, though heavily obfuscated, appears to be a search query, further supporting the phishing lure attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • 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://vilenefex.ru/strik?utm_term=is+toro+a+good+brand+snow+blower
    • http://cenderaoriginator.com/dalasukorebawonuluvozonajcf02l.pdf
    • http://ryduslim.website/berserk_manga_volume_21s55wi.pdf
    • http://vuxetexab.22web.org/tokimefibivikujaxedid.pdf
    • http://artistichomesolutions.com/75587366687ux5pv.pdf
    • http://smartradiobf.ru/galafnil5v.pdf
    • http://naturwow.space/dujegezekjjf8q.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zikeko/epson_wf_3540.pdf
    • https://s3.amazonaws.com/sorapobuk/56673767842.pdf
    • https://s3.amazonaws.com/lazolu/72356755441.pdf
    • https://s3.amazonaws.com/puretulenuza/33710583400.pdf
    • https://s3.amazonaws.com/fizup/which_of_the_following_is_true_about_the_auditors_observation_of_the_clients_physical_inventory.pdf
    • https://uploads.strikinglycdn.com/files/032d8804-f40f-4bd7-b7c8-6f5d75999f5c/lomemapabavevaze.pdf
    • https://uploads.strikinglycdn.com/files/14e31dfe-fd10-4031-a326-c2b29b29479f/the_story_of_orion_constellation.pdf
    • https://uploads.strikinglycdn.com/files/abf78f13-8df9-4890-906e-7d024ea95320/does_verizon_offer_jitterbug_phones.pdf
    • https://uploads.strikinglycdn.com/files/be48a19b-0db7-439a-99e0-7c2b748025ee/nuliwiwajuvevava.pdf
    • https://s3.amazonaws.com/wajibile/jojidej.pdf
    • https://uploads.strikinglycdn.com/files/88323423-48ae-49c2-932c-cba7e5c9ff59/toro_power_clear_721_r_e_reviews.pdf
    • https://uploads.strikinglycdn.com/files/4ed3b614-cd17-4f35-82cc-315b8c919e6e/fepadukalusexif.pdf
    • https://s3.amazonaws.com/luborinizu/setusi.pdf
    • https://uploads.strikinglycdn.com/files/6883e114-0e55-4210-815b-1ff17e8e1b69/how_to_connect_plantronics_vista_m22.pdf
    • http://burupopevetu.rf.gd/buick_century_2002_motor_oil_type.pdf
    • https://uploads.strikinglycdn.com/files/e60f4c66-4a51-44ed-92e0-8c645ec29dd4/what_is_the_world_political_map.pdf
    • https://s3.amazonaws.com/ximupuv/25416786109.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_off0000eeae.bin
1da645de103431c161845196cc301748b6a32d0bb611a2104d500e1fce0ddb03		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEEAE 5164 bytes
font_01_sfnt_off00010057.bin
857869c5185ac641780702714485d663a9cfd0ddf1c4343a90429823e247fb50		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10057 11064 bytes

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