Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0acd8d52fc8685b…

MALICIOUS

PDF

66.7 KB Created: 2020-12-23 04:56:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 86d23fcd89dc154bc5be198c87f2cc8e SHA-1: a74508b989db24d4e0632e4d779498db85ab64c6 SHA-256: a0acd8d52fc8685bc0ca05fab48a0da5ece77a618b09fc5380b2f01391ea4b29
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution 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 embedded URI pointing to 'traffking.ru', which is likely a malicious redirector. The presence of a 'download button' heuristic further suggests a social engineering attempt to trick the user into downloading a payload.

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffking.ru/strik?utm_term=growtopia+hack+download+pc
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/0134e21e-9438-47be-8843-69ed81d288d0/11323631459.pdf
    • https://uploads.strikinglycdn.com/files/e145bf99-8e85-48f5-b2a6-d7228844608d/fipikewibagofexeloni.pdf
    • https://s3.amazonaws.com/sazariwapa/92192688557.pdf
    • https://uploads.strikinglycdn.com/files/17963abc-cde6-43d8-9c6d-00f9836cc297/cdma_tool_dfs_professional_software.pdf
    • https://uploads.strikinglycdn.com/files/b4829cf2-555b-4bd7-8f59-95460aa0ed33/35195189139.pdf
    • https://uploads.strikinglycdn.com/files/62ce0824-5d80-462b-bb98-fcc439506e28/98681768501.pdf
    • https://static1.squarespace.com/static/5fc4cd50be9b69395123d147/t/5fcfd68aa8cbdc2f053f0585/1607456396413/iphone_digital_ringtone_mp3.pdf
    • https://uploads.strikinglycdn.com/files/a01d7b2f-a876-4abe-9464-0b870af7c407/rest_in_peace.pdf
    • https://uploads.strikinglycdn.com/files/b3e84a44-125c-4e90-8a87-9e59dcc585f5/capacitors_in_series_and_parallel_wo.pdf
    • https://uploads.strikinglycdn.com/files/a5f6bb6a-34c1-40ff-a907-d64d53e6ad45/human_chromosome_karyotype_worksheet.pdf
    • https://uploads.strikinglycdn.com/files/c2a97cf1-0e05-4ea7-a18b-7ae50378bdc6/nike_half_marathon_training_plan_km.pdf
    • https://uploads.strikinglycdn.com/files/58c4a9ed-1e1a-4b9e-b175-506fb676b354/the_fishing_club_3d_cheat_engine.pdf
    • https://uploads.strikinglycdn.com/files/8a808577-64b5-4a0c-91fe-2ce6e9749a79/babanexibuvavuj.pdf
    • https://uploads.strikinglycdn.com/files/ab19e74c-240d-4097-adbd-b74b1294d272/5574711962.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bcd8.bin
06d16fe1ce4fa720e183cfbaae152cb3267d4866db6d008de8a0df356d976c49		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBCD8 5168 bytes
font_01_sfnt_off0000ce74.bin
13678a14b930e6d42e11b2ac41b13981c2c7f5938cc30cfb194ad51886f1f1dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE74 2092 bytes
font_02_sfnt_off0000d819.bin
130d52c8096abb43c3ff3e639b192c800361caf9263ffe963e8994c7ac24577e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD819 11092 bytes

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