Malicious PDF — malware analysis report

Static analysis result for SHA-256 17cd3f0f541e95b1…

MALICIOUS

PDF

82.2 KB Created: 2021-03-09 18:03:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 6aaf37b671d6da482363d2860ff1d73c SHA-1: b30188cdc46da97112481f200d37cb94cbda73a1 SHA-256: 17cd3f0f541e95b131f2fc08f944064d28589a74b18d5266cfd3525d88895d90
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a primary focus on directing users to a suspicious domain disguised as a search result. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to exploit user trust by mimicking legitimate search content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://seumenha.ru/award?keyword=arithmetic+sequence+and+series+formula+pdf PDF link annotation
    • https://cdn.sqhk.co/legusovej/iqhjQa0/xixamejidul.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408187/normal_5fe087c1a16e8.pdfIn PDF document text
    • http://muzibatixabu.mypressonline.com/36040172648.pdfIn PDF document text
    • https://cdn.sqhk.co/loganidob/3snhgij/free_metal_gear_solid_ringtone_iphone.pdfIn PDF document text
    • http://gowanenutik.mypressonline.com/how_to_reverse_traxxas_tq_steering.pdfIn PDF document text
    • http://xatovapotogu.mywebcommunity.org/joindre_plusieurs_en_ligne.pdfIn PDF document text
    • https://cdn.sqhk.co/kedezoge/fhjieig/tower_defense_crush_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/jowapezo/cRhrgga/mijejafesox.pdfIn PDF document text
    • https://cdn.sqhk.co/wugolekufo/mxajgZt/97017549810.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377679/normal_5fed129d48a4b.pdfIn PDF document text
    • http://vumonivaxozutod.mypressonline.com/barujilakugivanalojisowi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426088/normal_5ff91db6a4d14.pdfIn PDF document text
    • https://cdn.sqhk.co/nebuwaxisiw/chi0LiO/death_road_to_canada_gog_review.pdfIn PDF document text
    • http://piwulag.sportsontheweb.net/5e_magic_weapons_by_rarity.pdfIn PDF document text
    • https://cdn.sqhk.co/jonilinenuvo/ENHkida/fun_facts_about_dogs_hearing.pdfIn PDF document text
    • https://cdn.sqhk.co/wapogade/5RgiicY/tazum.pdfIn PDF document text
    • http://lalabomujulimof.mywebcommunity.org/resumen_del_libro_el_principito_capitulo_14.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465015/normal_5fe6028bdaef9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456128/normal_6040418de04c3.pdfIn PDF document text
    • http://kikababono.mywebcommunity.org/52172502880.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://livirava.atwebpages.com/sutojowevepibubolino.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d35b2b5c-0f65-4ef1-9517-b807ccd84df6/what_is_the_biggest_living_creature_on_earth.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09b73442-f913-4e63-a549-3d4d39e096dc/tomtom_one_n14644_preis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/182f4562-c096-4228-8ee6-89cd409fe9dc/what_is_the_purposes_of_writing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18ff6485-c769-470f-a5f7-4b87d52a51b1/6313716915.pdfIn PDF document text
    • http://nitubak.atwebpages.com/35151168848.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edd46fc6-3787-440d-894d-746040235ee2/mofimeraxano.pdfIn PDF document text
    • http://xuvekixofeku.onlinewebshop.net/99200392693.pdfIn 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_off000100e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100E1 5508 bytes
SHA-256: f177031ce1eb2160c4f8ebc235e7913b48237b3058ec88ead05159cf79055c46
font_01_sfnt_off00011378.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11378 12148 bytes
SHA-256: 91404f50bc75ab0846dad263d010220674065672c3d26ce1e2fae5fa6affc5fc