Malicious PDF — malware analysis report

Static analysis result for SHA-256 2824b01018fb5fe2…

MALICIOUS

PDF

81.6 KB Created: 2021-03-22 03:13:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cea77dbb26949a6b41603807143c3922 SHA-1: d3af72259c963054d08838edca5872de73893d74 SHA-256: 2824b01018fb5fe271d72160424bd755dbdae97dee09e0aa388aec700894e98d
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to potentially malicious domains, and is flagged by ClamAV as a phishing trojan. The document body, though heavily obfuscated, contains keywords related to 'clash of clans mod apk', suggesting a lure for users seeking game cheats or downloads. The presence of many external links, including a large link farm, indicates a strong intent to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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
  • 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://xezojetit.ru/wix?keyword=clash+of+clans+mod+apk+gems+coins
    • https://zepiwifolu.weebly.com/uploads/1/3/5/9/135965208/33418ff8.pdf
    • https://cdn.sqhk.co/suzeboxiwo/fijat0d/vedulare.pdf
    • https://xirovule.weebly.com/uploads/1/3/4/7/134749068/lirar-lelexufoni-zametideju-mamiwix.pdf
    • https://ramakizuwag.weebly.com/uploads/1/3/4/3/134321509/kudakavi.pdf
    • https://cdn.sqhk.co/dufikibagi/7rji5QI/bafg_berlin_formblatt_3.pdf
    • https://cdn.sqhk.co/goworonol/yRdigdx/best_sms_marketing_platforms.pdf
    • https://cdn.sqhk.co/sosobita/Hfugjc1/main_street_pets_haunted_village_ghost_towns.pdf
    • https://misetibu.weebly.com/uploads/1/3/1/4/131438078/fawatawil.pdf
    • https://bezigetomesijag.weebly.com/uploads/1/3/1/0/131070469/jenimob_fosefanada.pdf
    • https://cdn.sqhk.co/nanuvoxeva/gemgifM/run_android_apps_on_windows_phone.pdf
    • https://salexutoxor.weebly.com/uploads/1/3/4/7/134761189/lapap-pusebuvogewafo.pdf
    • http://nopejinon.iblogger.org/amplitude_modulation_problems.pdf
    • https://nenomoxemobare.weebly.com/uploads/1/3/6/0/136010140/nifezureku.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/0a8d8d57-0abb-453e-af1c-3b4d895b34fb/chauvet_intimidator_spot_led_350_problems.pdf
    • https://uploads.strikinglycdn.com/files/0e7886e4-8666-49af-9f23-ff5942895044/multimodal_deep_learning.pdf
    • https://uploads.strikinglycdn.com/files/de231d0c-8ecd-4229-95bf-223a3496cb18/roruj.pdf
    • https://uploads.strikinglycdn.com/files/f9ac91f0-7570-4c3a-adf7-455251d58d55/mavinadagasomofagub.pdf
    • https://uploads.strikinglycdn.com/files/7168e699-320b-48b7-9b22-b2408213c349/8904699728.pdf
    • http://sulorunak.rf.gd/i11_5._0_airpods_manual.pdf
    • https://uploads.strikinglycdn.com/files/3226f4d0-fa11-4372-8b6a-e0f80101e770/41701617735.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_off0000f4a8.bin
5895ef29e030f2e33fd9748f9d6986a2e4a4218d4f2bfca5844ce4bf652a3f2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A8 5268 bytes
font_01_sfnt_off00010668.bin
b55b1db1ad5f2a4bc16c1ed86744ef17c31006eb65e115468f0b78c3dae5528d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10668 10832 bytes
font_02_sfnt_off00012b26.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12B26 4324 bytes

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