Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc41cb2801780ad6…

MALICIOUS

PDF

82.8 KB Created: 2021-03-30 14:31:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 7546967f8f935abb7fcdf6336fc77539 SHA-1: eb7736e6fae0f07dfec14e569ec8898c47747795 SHA-256: fc41cb2801780ad6db62bd0307145e8026985431d674aeeaa8f337427d3bbe27
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external URLs, many of which are hosted on disposable domains, suggesting a link farm or redirection scheme to facilitate phishing. While no scripts were explicitly extracted, the PDF structure and the presence of external links are indicative of an attempt to redirect users to malicious sites, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://dugedepap.ru/123?utm_term=le+cercle+chromatique+pdf PDF link annotation
    • http://austritkfa.com/directv_genie_remote_rc73_volume_not_workinge9ofz.pdfIn PDF document text
    • http://hookup673.site/que_es_aneuploidiaqrrqz.pdfIn PDF document text
    • http://wildboost.club/here_i_am_lord_scripturefz6mb.pdfIn PDF document text
    • https://susudomi.weebly.com/uploads/1/3/5/3/135319884/1694530.pdfIn PDF document text
    • http://muwiduvepobuz.mygamesonline.org/14075296530.pdfIn PDF document text
    • https://cdn.sqhk.co/pomorezolo/e6jaji5/knight_rider_car_model.pdfIn PDF document text
    • https://kiwogadewabinox.weebly.com/uploads/1/3/4/0/134017617/tutipadubizonafe.pdfIn PDF document text
    • https://dosoludu.weebly.com/uploads/1/3/0/8/130814101/8a520.pdfIn PDF document text
    • http://lifeeuro.info/xitajopac1y79.pdfIn PDF document text
    • http://fofumumitem.medianewsonline.com/tidetekigowojataz.pdfIn PDF document text
    • https://cdn.sqhk.co/zaniridut/i7hfZji/slot_race_double_track_walmart.pdfIn PDF document text
    • https://jinimajaloxole.weebly.com/uploads/1/3/5/3/135314869/jesiwevetoba.pdfIn PDF document text
    • https://cdn.sqhk.co/zomidami/Mnib4lU/bitlord_2._4._1.pdfIn PDF document text
    • https://kekufekogaj.weebly.com/uploads/1/3/4/7/134768560/riruk.pdfIn PDF document text
    • https://cdn.sqhk.co/bugininaxi/AAhiMji/rulivewawo.pdfIn PDF document text
    • https://cdn.sqhk.co/wagomito/DZGgfEG/melodyne_free_download_mac.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a704586a-5be1-4835-a5b7-50e74044ff1e/subupafesokubuvokuzu.pdfIn PDF document text
    • https://70fbc5f3-53e4-4072-9ff7-a5862d19847b.filesusr.com/ugd/bb3bf9_41b81b7ae02642fe9cddf1304ad3141c.pdf?index=trueIn PDF document text
    • https://4eb3a9b5-ca6a-4b2a-896e-878abc754f3b.filesusr.com/ugd/f1ab86_970cc57a279f4981afd883ac6e460237.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/71e3a12e-dd88-471e-bb7c-4415e9243963/best_saltwater_fishing_gear_for_the_money.pdfIn PDF document text
    • http://dozopedatofol.atwebpages.com/bansal_classes_study_material_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8035d46-9b16-4f19-82a6-ba1b8dc9ad41/41871640351.pdfIn PDF document text
    • http://zudupaxub.myartsonline.com/zijuzaju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9314612-a7d2-44e5-be9d-aa104398f1d3/the_sacrificial_egg.pdfIn PDF document text
    • https://88749095-6fd7-453f-8e8a-15b48fe47dd1.filesusr.com/ugd/e4d7df_7c5892384ea14c5d99e4ac8d8464abe1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b5f12e9-af1b-4b9e-821e-963dcb795292/fender_hot_rod_deluxe_3_price.pdfIn PDF document text
    • https://4e4301d6-cc9a-4939-960a-6b497c1efea6.filesusr.com/ugd/d78803_0cfd7ea0e3c84a3f8a81d63120fd2759.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010283.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10283 5284 bytes
SHA-256: dcc979d101baab77e87dbc6ebc9492de179262e5a61e09288363a47c4516ded0
font_01_sfnt_off00011450.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11450 12704 bytes
SHA-256: c60f5b65b25fb96a730917adfa6abbc89170480b5bc340eb48eb68d07e517673