Malicious PDF — malware analysis report

Static analysis result for SHA-256 77de3a7e7894a8b3…

MALICIOUS

PDF

72.6 KB Created: 2021-01-10 07:42:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 288d38721ede6e73a2ff6cc020421fe1 SHA-1: ef9ff67d4c23b210ea874122a97a8b96ff609fb4 SHA-256: 77de3a7e7894a8b32a109f07a56b1f4fd886eb8242e88c8c351afb89735479de
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged by multiple heuristics and an ML classifier as malicious, specifically as a phishing or trojan delivery mechanism. The presence of an external URI pointing to 'traffnew.ru' suggests a download or redirection attempt. The 'SE_REMOTE_SUPPORT_LURE' heuristic indicates the document's content is designed to trick the user into installing or running remote support tools, a common social engineering tactic for malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://traffnew.ru/123?utm_term=unity+center+for+urban+technologies+website
    • https://cdn.sqhk.co/povewepalu/Xjdaojh/13229491055.pdf
    • https://cdn.sqhk.co/befozaxulot/jiOWidn/online_slots_for_real_money_canada.pdf
    • https://cdn-cms.f-static.net/uploads/4374371/normal_5f8d0006c9128.pdf
    • https://cdn.sqhk.co/definuseju/djc8MgP/sector_144_noida.pdf
    • https://cdn-cms.f-static.net/uploads/4370268/normal_5f956501a00e7.pdf
    • https://cdn-cms.f-static.net/uploads/4413719/normal_5fc2b77ef3994.pdf
    • https://cdn-cms.f-static.net/uploads/4393041/normal_5f9fd285b30bf.pdf
    • https://cdn.sqhk.co/zenetofuma/djyhagi/paypal_prepaid_debit_card_login.pdf
    • https://site-1166616.mozfiles.com/files/1166616/field_hockey_stick_vector_graphic.pdf
    • https://cdn.sqhk.co/rasufizo/ihSgijf/teamviewer_quicksupport_mac_permissions.pdf
    • https://site-1172732.mozfiles.com/files/1172732/tusesosoril.pdf
    • https://cdn-cms.f-static.net/uploads/4379359/normal_5fae48b15df4a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wotodedaruzuk/leche_bromatologia.pdf
    • https://s3.amazonaws.com/tobaziw/48996336195.pdf
    • https://s3.amazonaws.com/vexosafugunu/pinochle_cheat_sheet_for_beginners_printable.pdf
    • https://s3.amazonaws.com/luxelula/free_steel_drum_sheet_music_for_beginners.pdf
    • https://s3.amazonaws.com/sesafefanulokam/64542767574.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_off0000dc8b.bin
de885507ce06082e3ff7672055fe743edd6838b4fc56d5f88c5d927f44e25b74
pdf-font-stream PDF embedded font (sfnt) at offset 0xDC8B 5468 bytes
font_01_sfnt_off0000ef3f.bin
809a4acc4da677273a824d7c6ef61a2a35e498c79360de0c01008737fea6208f
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF3F 11156 bytes