Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3d91f043f2267f6…

MALICIOUS

PDF

77.7 KB Created: 2021-03-29 01:14:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 2fa87f52f84e27230263bd2377133b70 SHA-1: eda0f151e7adcd2abd838157b3d39dccb5ad0269 SHA-256: e3d91f043f2267f67720e17cb3073613d4545bb5abc25ef33378520d6afcfcfd
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ML and ClamAV, as malicious. It contains numerous embedded URLs pointing to a mix of unknown and confirmed benign domains, suggesting a link farm or phishing attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically indicates a non-clustered link farm on disposable hosting, reinforcing the phishing or malicious redirection pattern. No scripts were extracted, but the presence of external URIs and the link farm nature of the document strongly suggest a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://vilenefex.ru/aws?utm_term=sony+mex+n4100bt PDF link annotation
    • https://cdn.sqhk.co/vinogusi/ihggzhg/call_of_spartan_mod_apk_3._6._7.pdfIn PDF document text
    • https://cdn.sqhk.co/jisokemefaz/xhhhewh/mirror_home_workout_reviews.pdfIn PDF document text
    • https://cdn.sqhk.co/pigexebobe/ierThdl/26812390163.pdfIn PDF document text
    • http://kakorixow.mygamesonline.org/bunudazafeforisopo.pdfIn PDF document text
    • http://furunud.22web.org/vifosil.pdfIn PDF document text
    • http://pejedoreraberet.22web.org/tunotafizilepime.pdfIn PDF document text
    • http://fajikiviwakux.22web.org/sherlock_holmes_crimes_and_punishments_crack.pdfIn PDF document text
    • http://lagujegivupani.22web.org/fuzetojujobexi.pdfIn PDF document text
    • https://cdn.sqhk.co/devuzemalut/icP4hdP/hover-_1_titan_troubleshooting.pdfIn PDF document text
    • http://mamafiposorugul.sportsontheweb.net/87205607229.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://viputuv.rf.gd/how_to_find_density_from_pressure_and_temperature.pdfIn PDF document text
    • http://wejajesenopezoj.onlinewebshop.net/how_to_turn_on_oster_coffee_maker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb577c3b-07f0-4bc0-96ce-95cdd12fc19b/lujowifumatonaruzepopi.pdfIn PDF document text
    • https://e31b828f-dd5d-4b35-abba-5777d5fc2ed6.filesusr.com/ugd/56a8cc_f5c0c2dc0ed24deeaf36fc6f5d44b898.pdf?index=trueIn PDF document text
    • https://0b46dc67-b6bf-47f6-be73-9cc337a8c672.filesusr.com/ugd/4fb05f_ed70b9757d0f44839da5f7c3a7a087f8.pdf?index=trueIn PDF document text
    • https://c2dbac7f-2075-4dc1-ad03-af0d0352bff2.filesusr.com/ugd/278743_80f9cfda625e49998c1297fb8da1c343.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/247975da-63c2-486d-8fc9-c432d7c35562/23663623031.pdfIn PDF document text
    • http://sanenuxaxegozez.rf.gd/bomunoji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a348e251-a62b-4da3-ba34-aa01ed7a0759/gadoruvosude.pdfIn PDF document text
    • http://rodaselawowov.rf.gd/8277191231.pdfIn PDF document text
    • http://zivositad.rf.gd/the_america_s_test_kitchen_quick_family_cookbook.pdfIn PDF document text
    • https://1cd0d4d5-11d4-440c-a307-81f73801f601.filesusr.com/ugd/f0e51d_c28804445faf4ba49c26313da4239efa.pdf?index=trueIn PDF document text
    • http://menivafanar.epizy.com/best_bass_booster_app_for_android_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3c15075-bbe7-4dc1-a883-82be1b3f4c5e/what_is_four_p_in_marketing.pdfIn PDF document text
    • https://2c9641c8-5874-4869-9b94-f1378e60aa6b.filesusr.com/ugd/efc1f6_dab39062ea2b4181beee39e9a6d174e4.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B1 5008 bytes
SHA-256: bc3cafa470e1f25027282214de6df319866a8c2289746ebda56076763a78e87c
font_01_sfnt_off0000f3c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C3 6068 bytes
SHA-256: 63694f3f619cbb2e66fd91139896bd6a7284d10f2fa1e57fb30022c6dff2bd3d
font_02_sfnt_off00010371.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10371 10996 bytes
SHA-256: a2ea6fb7f036027ebb42a788205c3db725abb7cd0f609bb4086ee8bfa0eefdec

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