Malicious PDF — malware analysis report

Static analysis result for SHA-256 14d8185168e7a6bb…

MALICIOUS

PDF

109.7 KB Created: 2021-04-07 20:05:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 1c9d4565dc30a91386568e77a3bc1187 SHA-1: ee846067989528548ebbbada6672dc5ff0a9c0d0 SHA-256: 14d8185168e7a6bb87680bb94331045594e0776e00dacc70eb67a4fcd85dd0d7
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to disposable domains and are flagged as malicious redirectors. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to phishing sites or download further malware. No scripts were extracted, but the primary attack vector appears to be the malicious redirection links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/strik?utm_term=what+is+simple+key+loader In PDF document text
    • https://kuximakid.weebly.com/uploads/1/3/0/7/130739256/notinimepa-woden-zalob.pdfIn PDF document text
    • https://kurebefa.weebly.com/uploads/1/3/1/1/131164205/9212477.pdfIn PDF document text
    • https://dalagusixofu.weebly.com/uploads/1/3/4/8/134853238/f54227c9e5.pdfIn PDF document text
    • http://instapriz24.online/barbie_doll_poem_annotatedc9dlp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410975/normal_6029fba10d766.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489045/normal_5ff97246ba90e.pdfIn PDF document text
    • http://zujejilolo.scienceontheweb.net/80670251913.pdfIn PDF document text
    • https://nilidufudomalo.weebly.com/uploads/1/3/2/7/132740748/e6503.pdfIn PDF document text
    • http://xilibinebosapeg.mywebcommunity.org/factoring_polynomials_test.pdfIn PDF document text
    • http://dreamingdeveloper.com/como_hacer_formato_apa_en_word_sexta_edicionmq6eu.pdfIn PDF document text
    • http://aydym.club/mhw_iceborne_weapon_guideamrqk.pdfIn PDF document text
    • http://phulop.store/washington_gas_customer_service_emailghbdl.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459328/normal_5fc57920550f6.pdfIn PDF document text
    • http://silekutum.medianewsonline.com/logical_reasoning_tricks_for_cat.pdfIn PDF document text
    • http://pofuxubilet.sportsontheweb.net/how_do_i_set_up_my_roku_streaming_stick_without_a_remote.pdfIn PDF document text
    • https://cdn.sqhk.co/nanubebebot/gdYNIqO/morava.pdfIn PDF document text
    • https://xavapijiwo.weebly.com/uploads/1/3/3/9/133997403/kudafinutezek.pdfIn PDF document text
    • https://cdn.sqhk.co/kevapaboxer/jpUNejb/gevizapiketisititubeva.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://totuxivez.onlinewebshop.net/73798579325.pdfIn PDF document text
    • http://kadizilurojiniz.onlinewebshop.net/certificato_anamnestico_patente_modulo_2020.pdfIn PDF document text
    • http://watusatuvor.myartsonline.com/sahih_al_bukhari_arabic.pdfIn PDF document text
    • http://lurarapekakaka.atwebpages.com/effects_of_air_pollution_on_plants.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_off00016fb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16FB0 5380 bytes
SHA-256: 32d6e88c44d483e4290d6212108223241c40a73797384a63007d919de51f3bb1
font_01_sfnt_off000181dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x181DC 11844 bytes
SHA-256: 71b1c842487383986a77bed637d11904904b4fecec21892087189cb194807a0e

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