Malicious PDF — malware analysis report

Static analysis result for SHA-256 143c609bcbf42a2d…

MALICIOUS

PDF

80.6 KB Created: 2021-03-15 14:00:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 8d16cbb9d3a5351c9ba2c40d6b073441 SHA-1: 9ef2f84922f3eed33dfbb2134f42cd082a204e33 SHA-256: 143c609bcbf42a2db25430b74880fed109c4f7b801eeb13dc1ffaac040cb09b3
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9993

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://nipisod.ru/123?utm_term=consolidated+financial+statements+questions+answers+pdf PDF link annotation
    • https://cdn.sqhk.co/rolileduvof/cb0Z4gj/71340543804.pdfIn PDF document text
    • https://teligodinawam.weebly.com/uploads/1/3/4/4/134457670/f23c90702.pdfIn PDF document text
    • https://nowagomasililub.weebly.com/uploads/1/3/0/7/130775830/pewep.pdfIn PDF document text
    • https://cdn.sqhk.co/fapewakuw/ejdCgeN/12334791380.pdfIn PDF document text
    • https://fetesebi.weebly.com/uploads/1/3/4/8/134896421/futelufobiwafev-javidekedupiso-jevozexamilefoj.pdfIn PDF document text
    • https://vadurevagide.weebly.com/uploads/1/3/3/9/133999829/b02c5e.pdfIn PDF document text
    • http://trackengine.host/zelixufanazosezotakakodaeyq2z.pdfIn PDF document text
    • https://cdn.sqhk.co/lomekojop/jXdgeRi/luzofikowa.pdfIn PDF document text
    • http://car-den.ru/is_law_school_worth_it_australianik24.pdfIn PDF document text
    • https://winateminapalem.weebly.com/uploads/1/3/4/0/134041456/6560266.pdfIn PDF document text
    • http://onlinetiser.website/86972392570b14fl.pdfIn PDF document text
    • https://cdn.sqhk.co/dubibuwa/hexzfja/49766538035.pdfIn PDF document text
    • http://www-sfr-fr-monespace.com/alkyd_resin_technologyeeuiq.pdfIn PDF document text
    • https://cdn.sqhk.co/mosepoxik/sgiie89/dasiraginobozek.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sasugokomelu.rf.gd/troy_bilt_pressure_washer_2500_psi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/412fe7b9-7454-4fad-9730-4b3f69a15dce/72785060954.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd4c1984-6db6-4bd0-8d34-f5d21dbc1a33/what_not_to_eat_while_on_keto_diet.pdfIn PDF document text
    • http://nowimirozox.atwebpages.com/82724373199.pdfIn PDF document text
    • http://tisiwiruligeg.epizy.com/42943717425.pdfIn PDF document text
    • http://sutexuvidag.myartsonline.com/nigibidu.pdfIn PDF document text
    • http://jawuguv.epizy.com/24203975732.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86bc0f2e-f1aa-4c68-818f-9d2a920df6f5/this_sex_which_is_not_one_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3d3d6e5-83b2-4a5d-8721-6ddffb32bc28/what_is_business_math_in_high_school.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/516a5a52-0e21-4edf-8acb-af73c4122a80/medtronic_neuromodulation_product_list.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_off0000fbe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE5 5424 bytes
SHA-256: ea3a89e19e8c2ebe9370b7fefc5a8fa766d7854549be82f3d4b8847f7f06016b
font_01_sfnt_off00010e50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E50 11184 bytes
SHA-256: aefa6583a873723d3b822466a7434dce2e9089d9ede8eed1eb4a0c42c8eb2e34

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