Malicious PDF — malware analysis report

Static analysis result for SHA-256 f699f30eeadf0f80…

MALICIOUS

PDF

73.2 KB Created: 2021-03-22 05:28:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b60f5927e7a65fe54bc69fff1476a1a4 SHA-1: 5165ac7844ef8eeae4b6d2830055e03ec699d977 SHA-256: f699f30eeadf0f80695b25a756e4fc8780998713dc361979215ca908bfb8a49d
156 Risk Score

Malware Insights

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

The PDF document contains numerous external links, with a significant number pointing to potentially malicious domains, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The ML classifier and ClamAV also flagged this file as malicious, specifically as a phishing trojan. The embedded URLs suggest an attempt to redirect users to phishing sites or download further 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://midufefew.ru/wix?keyword=words+like+blending
    • https://moforikegumiret.weebly.com/uploads/1/3/2/6/132680993/lezab_jagexujej.pdf
    • http://boketizabujig.scienceontheweb.net/adultery_paulo_coelho_english.pdf
    • https://static.s123-cdn-static.com/uploads/4480149/normal_5fe1a6256786c.pdf
    • https://cdn-cms.f-static.net/uploads/4416675/normal_602c7b0fe9291.pdf
    • https://cdn.sqhk.co/defisepeniba/Cibijib/supertuxkart_download_latest_version.pdf
    • https://cdn.sqhk.co/vujenibolo/ejijhgi/29367788835.pdf
    • https://piwofenuxud.weebly.com/uploads/1/3/1/8/131871692/fivezemafiwimux_jurabifapobis_bakaxobodisegu.pdf
    • http://zikewexer.scienceontheweb.net/how_to_reset_honeywell_thermostat_th8321r1001.pdf
    • https://femobideja.weebly.com/uploads/1/3/4/7/134735935/nuvobad.pdf
    • https://cdn.sqhk.co/norifasil/ggiapgi/epic_battle_simulator_2_mod_apk_ios.pdf
    • http://xploitcrew.io/truck_driver_cargo_old_version_downloadq75pw.pdf
    • https://guditeni.weebly.com/uploads/1/3/4/5/134529862/gijoritaruvija-sorag.pdf
    • http://fifamarketbot.com/company_of_heroes_2_gameplay_multiplayervs4pl.pdf
    • http://hotita.space/the_last_exorcism_part_2_castrtekw.pdf
    • https://lobududovidaxu.weebly.com/uploads/1/3/3/9/133997350/1837251.pdf
    • https://cdn-cms.f-static.net/uploads/4468540/normal_604e7b63a4cd1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/b607ccfb-ee23-4403-b591-bb7264ec70bf/18922839259.pdf
    • https://uploads.strikinglycdn.com/files/a8f68e71-7626-48e3-8e13-851b54c8daf6/lodofuzefa.pdf
    • https://uploads.strikinglycdn.com/files/1b7f58fa-a822-41f4-af26-d2d10b9019ae/53664913378.pdf
    • https://uploads.strikinglycdn.com/files/3fadfc7d-4779-4983-b282-5875550d76e6/star_trek_discovery_cast_season_1_admiral.pdf
    • https://uploads.strikinglycdn.com/files/5f182f04-c93d-4102-aa05-ae136639969c/wefupomukaram.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_off0000e349.bin
05e68db2c65045a43c7bb7b0ee6ef5516ae6993e5adc0da1653645337b1fff1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE349 5000 bytes
font_01_sfnt_off0000f468.bin
4de64046ef47a9e0c1ffd7ee323a4b0778249d6090ea24d898ee19940a1d0dea		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF468 10544 bytes

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