Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd75b447636c1202…

MALICIOUS

PDF

66.6 KB Created: 2021-04-24 05:16:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3098ff41c34e45078ca9bda6c02c6dae SHA-1: 7306c709a10d8e76a04cb5caa460e1f7b00dd49a SHA-256: cd75b447636c12020441b681e481d63175a8e1f87eb908a444a486fd8799acc9
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are likely part of a link farm designed to manipulate search engine results or direct users to malicious content. The ClamAV detection and ML classifier also indicate malicious intent. The document body, though heavily corrupted, suggests a lure related to a book synopsis, which is a common tactic for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7003

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://resalured.ru/strik?utm_term=miss+peregrine%2527s+home+for+peculiar+book+synopsis
    • http://uggi-ugg.com/watchmen_2009_movie_download_in_tamilyogie7m81.pdf
    • https://static.s123-cdn-static.com/uploads/4475564/normal_5ffe849ba5089.pdf
    • https://pawajapik.weebly.com/uploads/1/3/0/8/130813804/7f056e.pdf
    • http://koteyarn.moscow/lexis_audio_editor_apk_mirrorkkda8.pdf
    • https://cdn-cms.f-static.net/uploads/4451230/normal_6024710a312a1.pdf
    • http://buyfastedcircle.xyz/yes_please_vs_yes_please2jpru.pdf
    • https://fogofude.weebly.com/uploads/1/3/4/3/134322730/lubisodegox-bexaxemunaxe-vapesur.pdf
    • https://nakuzimatixibo.weebly.com/uploads/1/3/5/3/135388853/japonuxazitejaw_soris.pdf
    • https://nutakiderovex.weebly.com/uploads/1/3/4/6/134622867/wufositi.pdf
    • http://24goodstore.site/fume_cupboard_face_velocity_testingikyoq.pdf
    • https://rudumareta.weebly.com/uploads/1/3/1/8/131871695/serulotamokis_dalukiv.pdf
    • http://dreamingdeveloper.com/52537414840wprwm.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://61df3396-90b5-4b69-a3ae-475c9da6ebc5.filesusr.com/ugd/516574_5c0d0efb4c5049879b7ce17b10bf21b6.pdf?index=true
    • https://uploads.strikinglycdn.com/files/972ad460-0f08-4de7-9a6a-fd2596887231/craftsman_16_electric_chain_saw.pdf
    • https://8909b315-4d59-4940-aabf-0fdaa532e0ad.filesusr.com/ugd/4542d9_cfc342796a5c4af6b79677f1e2e24b10.pdf?index=true
    • https://21e323bd-7fdd-46e9-a6c7-4880e76d7610.filesusr.com/ugd/0a51c1_9534bd98532749c0972f91413a1c8d52.pdf?index=true
    • https://0f0532cb-4478-41f9-91a1-cf277c4732ec.filesusr.com/ugd/8acad3_c13ebab4c29f49bea653ec24373364b0.pdf?index=true
    • https://uploads.strikinglycdn.com/files/75127f04-934f-4f97-8718-61d64d7639b3/rifebodisazof.pdf
    • https://uploads.strikinglycdn.com/files/0c63ea7f-461b-4126-8043-2490fb86a597/dodukuvizopapuranifede.pdf
    • https://uploads.strikinglycdn.com/files/00c28888-e5bd-4a89-a34c-72a9a992a3b7/how_to_reset_nighthawk_carbon_monoxide_alarm.pdf
    • https://uploads.strikinglycdn.com/files/f840156f-b7ab-4f25-a45b-550cf597a88b/manual_de_carreo.pdf
    • https://uploads.strikinglycdn.com/files/df634a57-2651-434a-a4ef-aac1a335601e/88203349568.pdf
    • https://uploads.strikinglycdn.com/files/2e156620-49d7-4c14-8778-894c313a8e38/jasasajo.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0f5.bin
214cc2863f5593f219f2a6369d26b0c5091ae24f67f4e7c92e6b30c91ed2a89d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F5 5776 bytes

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