Malicious PDF — malware analysis report

Static analysis result for SHA-256 bebd02c8ce61268c…

MALICIOUS

PDF

70.3 KB Created: 2021-03-10 22:51:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02ebb8869bee801acc9c4c99db1544af SHA-1: 713a5187d7c8a64967b5a9693fb33ef8be047c82 SHA-256: bebd02c8ce61268c7c81b105987a6fdb5c512e568bc30d98d02bc469063442fe
164 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a link farm. The document body, though heavily obfuscated, suggests a lure related to 'free arcade' content, likely to entice users to click on the embedded malicious URLs. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://crophysi.ru/strik?utm_term=how+to+get+arcade+for+free+with+twitch+prime
    • https://repawuwo.weebly.com/uploads/1/3/5/3/135313919/6326452.pdf
    • http://simopuvoramawu.mywebcommunity.org/14712836945.pdf
    • https://cdn.sqhk.co/folamudoj/agfrqBd/zelulibelejabul.pdf
    • https://cdn.sqhk.co/vofonowul/ftlghxn/jegexufowilelaxuf.pdf
    • http://lupaper.22web.org/alberta_blue_cross_application_forms.pdf
    • https://wagigezo.weebly.com/uploads/1/3/0/7/130775958/gukazimezojod_garobanikaramen.pdf
    • https://cdn.sqhk.co/lamidipeke/brhirxT/57158284814.pdf
    • http://wifisef.medianewsonline.com/10921179562.pdf
    • http://wajofima.mywebcommunity.org/87591607772.pdf
    • https://bazojarazete.weebly.com/uploads/1/3/4/6/134650598/815428.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/37c3d986-a904-45b2-aef5-dd3f657e5dfd/dewalt_380mm_3600psi_pressure_washer_surface_cleaner_accessory_dxpaz36sc.pdf
    • https://uploads.strikinglycdn.com/files/f8ad21ac-5474-4f8d-bbe2-40c2d6cb3678/25795350838.pdf
    • https://uploads.strikinglycdn.com/files/0e3f17b9-5b74-4739-9f4f-8462765d3cde/50015987170.pdf
    • https://uploads.strikinglycdn.com/files/cf01719b-3969-476e-b910-38d3cebc5617/directv_rc66_remote_codes.pdf
    • https://uploads.strikinglycdn.com/files/fe9cc8f8-c19c-42f1-9399-2d40402ad476/journey_to_the_west_2_movie_in_hindi.pdf
    • https://uploads.strikinglycdn.com/files/a492d860-7a9e-4765-abd9-a5980fa13274/98658974216.pdf
    • http://borobosen.rf.gd/xozotexuvezilofexo.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_off0000d60a.bin
5c18959d4fb664c2846be71babcca7f45580f9909cc0fefee21886a36accfbb0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD60A 5412 bytes
font_01_sfnt_off0000e864.bin
19da6a4b196240a5735844aaf485216b3badc8761c593d5492f12d8b944b1e54		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE864 10440 bytes

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