Malicious PDF — malware analysis report

Static analysis result for SHA-256 d62ce9031e19b5f3…

MALICIOUS

PDF

97.8 KB Created: 2021-02-21 20:06:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 9cd99b1813904c3ab3d5ac18b32663a8 SHA-1: 37d7f0b0c450401b47181d9cdc5b264cb204b881 SHA-256: d62ce9031e19b5f3b734c1af57ea7608c7d6f24bfda178016ecafc79ab87ecae
126 Risk Score

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 0.9990

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://maypoin.ru/123?utm_term=sat+high-frequency+word+list+2020 PDF link annotation
    • https://cdn.sqhk.co/rumomezojeku/jcidibU/lodopizadatima.pdfIn PDF document text
    • http://rankingcoach-seo.com/storm_the_beaches_bandndi0q.pdfIn PDF document text
    • https://cdn.sqhk.co/lazujanaziri/LjivRgj/jixorejafu.pdfIn PDF document text
    • https://cdn.sqhk.co/mopewedote/uIgdYih/4x4_russian_suvs_off-_road_saga_apk_download.pdfIn PDF document text
    • http://50offit.pro/mafupigustaf79.pdfIn PDF document text
    • http://afracheat5.xyz/bugupesokignzwz.pdfIn PDF document text
    • https://cdn.sqhk.co/xipitufekaru/eIrje29/nogawokirisatumemetumif.pdfIn PDF document text
    • https://cdn.sqhk.co/kurotevu/Y7RA5uS/greatest_alternative_rock_songs_of_the_90s.pdfIn PDF document text
    • https://cdn.sqhk.co/sibamoxa/jeXaica/balls_control_online.pdfIn PDF document text
    • https://cdn.sqhk.co/fakosopalo/Vxheia7/digestive_tract_definition_zoology.pdfIn PDF document text
    • https://cdn.sqhk.co/tamaladafa/iy5icha/fenuretunotomupaka.pdfIn PDF document text
    • http://connexion-amelii.xyz/80448664533cxwxd.pdfIn PDF document text
    • https://cdn.sqhk.co/rujiwujik/PiTjjhb/rome_citizen_bike_16.pdfIn PDF document text
    • http://poopo.ru/tonusetopakifomusoroksr7x5.pdfIn PDF document text
    • http://raifaisentapp.online/aprende_hangul_el_alfabeto_coreanooqpan.pdfIn PDF document text
    • https://cdn.sqhk.co/tefivezik/4Okjiji/xavosezoraxijarof.pdfIn PDF document text
    • https://cdn.sqhk.co/sofilita/tlgdhge/the_running_room_outlet_store_etobicoke.pdfIn PDF document text
    • https://cdn.sqhk.co/sawibevas/imTW6bs/vexasilanozapo.pdfIn PDF document text
    • http://henrysavbr.site/jewafinedehh8vv.pdfIn PDF document text
    • http://formblckr1.xyz/344492372077ncvz.pdfIn PDF document text
    • https://cdn.sqhk.co/vowibesep/UhjSieA/vuvot.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wivukirotodit.epizy.com/monosekoxijikekiwegaxem.pdfIn PDF document text
    • http://luxotenudiwuzu.rf.gd/construction_contract_template_philippines.pdfIn PDF document text
    • http://lofapubuwuleto.epizy.com/adwcleaner_link_safe.pdfIn PDF document text
    • http://vixuzuvubus.rf.gd/wozajaxokowolivexipojim.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_off0001408e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1408E 6012 bytes
SHA-256: d4c3f2d37e52873fea3d8287d2f16a0d77b3003739f4a73d5d007969425d604a
font_01_sfnt_off0001551b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1551B 10736 bytes
SHA-256: 6fd8004f990541ccc362dc1e32f9d65dbb339bb1e5ad1e8e9546e5fea2080028

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