Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dd3bac3d058dcc8…

MALICIOUS

PDF

66.9 KB Created: 2021-05-27 19:40:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b2e70d4f0a2d0bb37ad8f528df23cccb SHA-1: f2fc8850d14a137b39795cb0db8b2a3273d379f4 SHA-256: 7dd3bac3d058dcc86d8d45a49e460c9c2505a6ddf1ecbde538364ebd951383ca
154 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for SEO spam or phishing campaigns. One prominent URL, 'https://leonvi.ru/strik?utm_term=auto+clicker+for+mac+roblox+free', suggests a lure related to gaming or utility software. The ClamAV detection and ML classifier indicate a high likelihood of malicious intent, possibly related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8603

Heuristics 4

  • 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
  • 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://leonvi.ru/strik?utm_term=auto+clicker+for+mac+roblox+free
    • https://pudixibavumop.weebly.com/uploads/1/3/5/9/135964902/1001038.pdf
    • https://static.s123-cdn-static.com/uploads/4445544/normal_5ff2e5dd45a91.pdf
    • https://static.s123-cdn-static.com/uploads/4465003/normal_5fcb52476cece.pdf
    • https://static.s123-cdn-static.com/uploads/4393925/normal_5ffb461b3dee7.pdf
    • https://static.s123-cdn-static.com/uploads/4415531/normal_5fc9ee8bc2c02.pdf
    • https://static.s123-cdn-static.com/uploads/4425784/normal_5fcb9762e9812.pdf
    • https://cdn-cms.f-static.net/uploads/4386081/normal_60287519340c5.pdf
    • https://cdn-cms.f-static.net/uploads/4450878/normal_601dcb6cc47b2.pdf
    • https://static.s123-cdn-static.com/uploads/4366633/normal_5ffd4dd9bea5e.pdf
    • https://sivabukejiwija.weebly.com/uploads/1/3/4/4/134459056/dejewol_tokumekexi.pdf
    • https://static.s123-cdn-static.com/uploads/4394061/normal_5ffb1b1ceed07.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/90839fc8-ab23-4eed-ba40-5108a41b2ad1/sirazibijetiwebekeze.pdf
    • https://uploads.strikinglycdn.com/files/73bc6e26-09bd-4fdb-af88-4137e9a043d8/65267555752.pdf
    • https://uploads.strikinglycdn.com/files/778958dc-5af3-4173-9ad7-c1ad42967074/korg_triton_extreme_sustain_pedal_not_working.pdf
    • https://uploads.strikinglycdn.com/files/063e787d-f6e6-4c70-858d-e613c5cc8f28/how_do_i_connect_my_subwoofer_to_my_soundbar_jbl.pdf
    • https://uploads.strikinglycdn.com/files/66c422bf-534e-465c-bc41-c863bd397f5a/how_to_factory_reset_alesis_dm10.pdf
    • https://uploads.strikinglycdn.com/files/c5a02f5c-e5d2-42b0-890a-70871151865c/kenmore_french_door_refrigerator_parts.pdf
    • https://uploads.strikinglycdn.com/files/0bbaa568-6ec6-41ee-9f99-1a7d0f278747/how_to_fill_a_beldray_steam_cleaner.pdf
    • https://uploads.strikinglycdn.com/files/b9be561a-3b12-4bdd-99a2-7de6a339e05f/how_to_stikbot_studio.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e035.bin
5a872fe6ddc7b65e824336f43f257bd27813d0a04791c8f001c6be7ad3698db2
pdf-font-stream PDF embedded font (sfnt) at offset 0xE035 5108 bytes