Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d68eba25b373184…

MALICIOUS

PDF

84.8 KB Created: 2021-03-23 04:45:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c5bae19f64ae2468568763058425823 SHA-1: b375018e27be945bd1430aed7acc7085ecf70d83 SHA-256: 0d68eba25b373184f60ad4970be39d2aa71d006ff348f0eaefd567cc3409ced5
156 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which are SEO-optimized, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to redirect users to malicious sites or download further payloads. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic confirm the document's purpose is to distribute links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://seumenha.ru/wix?keyword=dyson+v7+hepa+direct+deep+clean+kit
    • http://kifejuja.medianewsonline.com/mixed_present_and_past_tenses_exercises.pdf
    • https://suxugugufagiwa.weebly.com/uploads/1/3/4/7/134740592/faxanuxurotoxevoza.pdf
    • http://vituloza.sportsontheweb.net/dawerasotibezopatab.pdf
    • http://zexawabezazojot.sportsontheweb.net/porujawesuvovowuxudige.pdf
    • https://cdn.sqhk.co/rukokota/hcUjhgc/45662879472.pdf
    • http://zanapipok.getenjoyment.net/amenaza_de_aborto_2020.pdf
    • https://nigoriwidoke.weebly.com/uploads/1/3/5/2/135296580/kisupu_bamimatogebo_dawogelusinomu.pdf
    • https://cdn.sqhk.co/sivefuxonix/lUginjh/download_sniper_captain_modern.pdf
    • http://tozofuji.scienceontheweb.net/bevogitolajufoz.pdf
    • http://mirumumavetifun.mypressonline.com/bavenogavebebeporivuku.pdf
    • http://bukipumil.mypressonline.com/83959328402.pdf
    • https://cdn.sqhk.co/monasomeb/gaiiihi/favourite_girl_song_320kbps.pdf
    • https://dodarumobite.weebly.com/uploads/1/3/1/4/131437296/gagopekixunutidapi.pdf
    • http://jisetatiloro.scienceontheweb.net/lujon.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://33edd578-4186-4695-89f3-f56a5a23fc53.filesusr.com/ugd/f17c08_f827b9894588483e934a78aa627a0216.pdf?index=true
    • https://uploads.strikinglycdn.com/files/190c2a77-547a-4e2a-8a0e-9e524a5a0742/livivito.pdf
    • https://12350a4d-732a-4148-85a7-4fa27f2a77ec.filesusr.com/ugd/17beed_881d9e6b821c4d74b50d5205a3075a85.pdf?index=true
    • https://uploads.strikinglycdn.com/files/f5288392-33c2-43fc-add2-f7270f68aba2/75622306706.pdf
    • https://uploads.strikinglycdn.com/files/a36357a9-4a15-40ea-ae50-a91a0cef49f1/nikon_sb-600_flash_not_firing.pdf
    • https://7133fc40-0b9c-4701-b953-e7fafc934b44.filesusr.com/ugd/70a38d_5f6f079e0d9b42bdbab79b9f1b863bc4.pdf?index=true
    • https://uploads.strikinglycdn.com/files/147e313e-3a26-4aba-8fb7-10576fc83a0e/how_to_smoke_a_prime_rib_roast_in_a_masterbuilt_electric_smoker.pdf
    • https://ed0f7819-48b4-4c0d-9119-93de03d81b9c.filesusr.com/ugd/e481ce_10896ab3a2ad41a38eb66806d80192b4.pdf?index=true
    • https://uploads.strikinglycdn.com/files/5d8c9fa0-9f42-4f89-84d0-923d102bf516/61793045238.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_off0000fe46.bin
3f7fb34e84ae785600163289ba8e5df66249295cdcebec529860a940befad841		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE46 5256 bytes
font_01_sfnt_off00011021.bin
ee35e1ce3e76ac3e6d8be1a741d077c5e6a2505940e5706bac97d5b59425f531		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11021 11592 bytes
font_02_sfnt_off0001378c.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1378C 4324 bytes

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