Malicious PDF — malware analysis report

Static analysis result for SHA-256 3abf7830db7c696d…

MALICIOUS

PDF

75.1 KB Created: 2021-03-08 17:23:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 7532f61361e0a8c8342d837512962ab4 SHA-1: 3814fe05c2d4a79cce00dd9fadf9f374d07bd850 SHA-256: 3abf7830db7c696d7cb90882a01350653634d9340312464ffb4468eb11e47c21
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous external URIs pointing to disposable hosting, suggesting a link farm designed to redirect users to potentially malicious content. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic specifically identifies it as a non-clustered link farm on disposable hosting, further supporting a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://botokaw.ru/award?keyword=cahier+des+charges+logo+exemple+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4499995/normal_601f8f477f53d.pdfIn PDF document text
    • https://tonituligavu.weebly.com/uploads/1/3/4/8/134884188/429830.pdfIn PDF document text
    • http://polobasopika.mywebcommunity.org/geronimo_stilton_saison_1_episode_2.pdfIn PDF document text
    • http://jiwapadenejeza.getenjoyment.net/10449569420.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428062/normal_603d0ae599c88.pdfIn PDF document text
    • http://tozofuji.scienceontheweb.net/lobudekibeb.pdfIn PDF document text
    • http://pirewarekow.mywebcommunity.org/64454973268.pdfIn PDF document text
    • http://ruwakus.22web.org/fm_global_approval_guide.pdfIn PDF document text
    • https://gijesetezoludad.weebly.com/uploads/1/3/5/3/135348421/7c357d698b7513.pdfIn PDF document text
    • https://jebopisozezir.weebly.com/uploads/1/3/0/7/130739828/6795885.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379500/normal_600545fa81513.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500208/normal_600bc8eccd7c6.pdfIn PDF document text
    • https://buriviniroxino.weebly.com/uploads/1/3/1/6/131606563/jinixoraxuxe-godavaru-bojune-keraforegimo.pdfIn PDF document text
    • https://sidutoxa.weebly.com/uploads/1/3/4/8/134886075/ritovumulaz_rumap_jexitod.pdfIn PDF document text
    • https://donodofi.weebly.com/uploads/1/3/1/8/131856097/3666034.pdfIn PDF document text
    • https://rugibabolunape.weebly.com/uploads/1/3/1/4/131454120/tunetidobinaw-girufa-gurebabeximugid.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://soruronapusule.rf.gd/84343755343.pdfIn PDF document text
    • http://taperimogitunal.epizy.com/17625926403.pdfIn PDF document text
    • http://dezobod.onlinewebshop.net/46416110342.pdfIn PDF document text
    • http://soranodabiwegi.myartsonline.com/how_to_draw_anime_girl_fighting_poses.pdfIn PDF document text
    • http://gitodake.myartsonline.com/watch_pride_and_prejudice_and_zombies_online_free_dailymotion.pdfIn PDF document text
    • http://vemesedesalo.rf.gd/74574623829.pdfIn PDF document text
    • http://zasegusof.epizy.com/steve_lawson_attributes_of_god_study_guide.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_off0000e4b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4B0 5540 bytes
SHA-256: 2343b3e5bfc189fda86a11192e8aa7d6a94c66eeb380e159516bebb223e0d427
font_01_sfnt_off0000f766.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF766 12252 bytes
SHA-256: 230d2f85b96877f7b74c18fcabace74e951d31767a1cca8f02f68c891a023776

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