Malicious PDF — malware analysis report

Static analysis result for SHA-256 ded7278d3d9facfe…

MALICIOUS

PDF

72.4 KB Created: 2021-04-25 13:09:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 597104bf064d93fe37d2cb20366a6489 SHA-1: 2e5757c50ac530bcb450d9d42012d4ff0c03eca4 SHA-256: ded7278d3d9facfed9dd64415e9e671e50f73efba3c835392a429de0da61d940
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://ponafet.ru/strik?utm_term=how+much+oil+do+you+use+in+a+stir+crazy+popcorn+popper PDF link annotation
    • https://cdn.sqhk.co/safubuguva/ajgcyon/54563472741.pdfIn PDF document text
    • https://vinawulisakuj.weebly.com/uploads/1/3/2/7/132712505/sapisogepadofu.pdfIn PDF document text
    • https://cdn.sqhk.co/bidufewo/Btijjdr/18258638698.pdfIn PDF document text
    • https://cdn.sqhk.co/vasozaponem/ahgb9rW/kitty_hawk_nc_hair_salons.pdfIn PDF document text
    • https://losebevaxefot.weebly.com/uploads/1/3/5/3/135347065/gejikulujoj.pdfIn PDF document text
    • https://cdn.sqhk.co/zoraxiraga/hjAgj0M/piano_sheet_music_for_beginners_free.pdfIn PDF document text
    • https://fulitadu.weebly.com/uploads/1/3/4/8/134863398/mugifaxivi.pdfIn PDF document text
    • https://jafipununevov.weebly.com/uploads/1/3/0/8/130814040/3388416.pdfIn PDF document text
    • https://cdn.sqhk.co/gesokusa/gdhhjil/sazajevavuxije.pdfIn PDF document text
    • https://cdn.sqhk.co/lebexuzo/wfxskij/mopogolimadodelururu.pdfIn PDF document text
    • https://devudupaf.weebly.com/uploads/1/3/4/8/134880603/4879702.pdfIn PDF document text
    • https://rafopovuweke.weebly.com/uploads/1/3/2/7/132740485/batimapusi.pdfIn PDF document text
    • http://jedusajinud.mygamesonline.org/57443734514.pdfIn PDF document text
    • https://jovonawokemurif.weebly.com/uploads/1/3/4/6/134678447/tidimadatekuvogof.pdfIn PDF document text
    • https://mipikarekegimo.weebly.com/uploads/1/3/1/6/131606279/2447319.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0ecef3a8-5193-4df1-8dcb-1b7dd0f2be2a.filesusr.com/ugd/e6092c_e33bc4c505fb4d3b9c3e6bdc5eabb66b.pdf?index=trueIn PDF document text
    • https://2e03c77f-99cc-4591-9807-54d8d49c9ce6.filesusr.com/ugd/759733_0c9f74a28848472ca163e1c8843acd1b.pdf?index=trueIn PDF document text
    • http://daximogosamov.myartsonline.com/bro_code_barney_stinson_free.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_off0000dcaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCAA 5520 bytes
SHA-256: 50f24311950d8412e34047986e9ba1bff544dbe091826ce9fb6f9cf2964ae4be
font_01_sfnt_off0000ef5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF5F 10808 bytes
SHA-256: 762507637426f0aa49b603710122d379e1b5941a37db492bf75ec520857b9ca3

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