Malicious PDF — malware analysis report

Static analysis result for SHA-256 887c5495693e53f0…

MALICIOUS

PDF

69.1 KB Created: 2021-03-17 08:38:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 6c9da5db1cf530c6c95466d20f4fcaf8 SHA-1: 5748ba847c37e9e9b1d1140afeb4c4c018082b83 SHA-256: 887c5495693e53f0d67596c918fd5d59a8345334378022f3bbcc20a32d2b5469
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO manipulation tactic. The presence of external URIs and the overall structure indicate it's likely part of a phishing or content distribution scheme, potentially leading to further exploitation.

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/wix?keyword=caldwell+livestock+auction PDF link annotation
    • http://bumufirila.mygamesonline.org/requisitos_para_ser_policia_judicial_en_mexico.pdfIn PDF document text
    • https://cdn.sqhk.co/ninituraxasu/fGqaifo/costco_gas_prices_in_las_vegas_nevada.pdfIn PDF document text
    • https://cdn.sqhk.co/mujawiru/jbjbhjO/pedetejibetis.pdfIn PDF document text
    • https://cdn.sqhk.co/divojimo/fhzsDhb/jages.pdfIn PDF document text
    • https://cdn.sqhk.co/xusawikorut/ggjhs3z/fox_racing_youth_motocross_gear.pdfIn PDF document text
    • http://silewugebed.scienceontheweb.net/fixijukax.pdfIn PDF document text
    • http://vixitatevejiwo.getenjoyment.net/star_trek_voyager_elite_force_2_no_cd.pdfIn PDF document text
    • http://kevekozulanilim.sportsontheweb.net/516574322.pdfIn PDF document text
    • http://connexion-amelii.xyz/josavidivefav9pfh.pdfIn PDF document text
    • https://cdn.sqhk.co/vefusujix/Wbhihbq/download_3d_snake_io_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/vewukiziwemi/gjdQQic/wink_news_weather_cam.pdfIn PDF document text
    • http://netewe8.xyz/jagatugawejevsrjah.pdfIn PDF document text
    • https://cdn.sqhk.co/tefozakozup/qjeXjjd/garden_sculpture_for_sale_near_me.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cf62593c-3f62-494e-9ef9-3c2a63ead7d7.filesusr.com/ugd/93dae2_c074c0d3b10d473cad45532b87bb95a3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/73ebb371-568e-420e-befb-b9c979456f82/essay_prompts_for_6th_graders.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9747feaa-8973-4d38-922b-41704cc513ee/52753816701.pdfIn PDF document text
    • https://1c92f6d8-19eb-429c-9239-1cf6be91372f.filesusr.com/ugd/cc1a03_69cd2c80a8e14ef0a46c9b36df196646.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/16660a6d-d815-428b-b56a-1fc3dcb6599b/59075545786.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbc58f2b-a9b0-4438-b829-6c1fc18b4caf/power_source_battery_charger_power_supply_model_pc_75.pdfIn PDF document text
    • https://3c8197b3-f999-4f29-b3da-fbdfea3dbf34.filesusr.com/ugd/0047a4_fc351aed567c4c059995473eca7701a6.pdf?index=trueIn 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_off0000d1ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1AE 4956 bytes
SHA-256: b338528a9ab554d582bdf96ce4aff7cacf2761500d40cb5ac8a7156c9f15af82
font_01_sfnt_off0000e2b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B5 11068 bytes
SHA-256: 87eb1a3d5131fa213630ad83107327ada541e24334a070e5d062612b25cc316c

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