Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3c4f00fc6f51ddf…

MALICIOUS

PDF

77.3 KB Created: 2021-04-07 19:18:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: de863060bcbf6b9907d820372c599b72 SHA-1: 1f223fb13ba3ce4db79c350d95e0781bc94c1f3c SHA-256: a3c4f00fc6f51ddf4b820dd03e2935a851cb4e14271f22ebc9b3fad8924eaeae
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_LINK_FARM' suggests the document is designed to host a large number of external links, likely to facilitate phishing or malware distribution. The embedded URLs, such as 'https://seumenha.ru/strik?utm_term=remington+model+700+sps+camo+30-06' and 'http://nejupike.mygamesonline.org/wuxoralake.pdf', are suspicious and likely lead to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 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.
  • 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://seumenha.ru/strik?utm_term=remington+model+700+sps+camo+30-06 PDF link annotation
    • http://nejupike.mygamesonline.org/wuxoralake.pdfIn PDF document text
    • http://fajiriduxir.medianewsonline.com/xr2_remote_not_controlling_cable_box.pdfIn PDF document text
    • http://wulixiv.sportsontheweb.net/documents_to_converter.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/penefelomiju/taduzuwawijomalomopav.pdfIn PDF document text
    • http://povodakav.myartsonline.com/after_chapitre_1.pdfIn PDF document text
    • https://s3.amazonaws.com/jupoti/old_school_runescape_trailblazer_league_hiscores.pdfIn PDF document text
    • https://299bc67c-4c9a-44ea-852c-18f2d39dca40.filesusr.com/ugd/954c8b_21853ee821fe48f587803b95588b74e5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nunakixuma/pdf_viewer_plus_se.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/vumogeripit.pdfIn PDF document text
    • https://s3.amazonaws.com/sewamos/chocolate_com_pimenta_novela.pdfIn PDF document text
    • https://7e005a1c-fb68-43c1-af83-b854b6a2d282.filesusr.com/ugd/dcfb95_34b5ec9123684d13b4857fa7938603ce.pdf?index=trueIn PDF document text
    • http://matewedidoxeber.onlinewebshop.net/ovid_metamorphoses_translated_by_rolfe_humphries.pdfIn PDF document text
    • https://12350a4d-732a-4148-85a7-4fa27f2a77ec.filesusr.com/ugd/17beed_fd114d06940740dbbb8e9322d1796df7.pdf?index=trueIn PDF document text
    • https://4993f9ff-345c-4c03-a8ec-d4f8dac664d6.filesusr.com/ugd/debbe1_eba5a882311342ca8a72f6523344fe11.pdf?index=trueIn PDF document text
    • https://1a441fb4-51dd-4528-a053-eb59ff664e18.filesusr.com/ugd/43d9d5_964d546b232f4412a84779a42514309e.pdf?index=trueIn PDF document text
    • https://ec75ba9f-29a7-4b73-bb51-4c951d20089f.filesusr.com/ugd/17cde0_83a9eea9442e44428c64f1c948bf3691.pdf?index=trueIn PDF document text
    • https://b7b9a0d4-d71d-433a-9dbc-8293b1c729aa.filesusr.com/ugd/979434_f1accb4a84c04882ab1c03ca9c94fbf3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/61046680746.pdfIn PDF document text
    • https://s3.amazonaws.com/vosimalume/zitozekefudogikilosadi.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/sfp-_10g-_sr-_s_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/mutants_and_masterminds.pdfIn PDF document text
    • http://kivozusemu.atwebpages.com/40527561581.pdfIn PDF document text
    • http://doxokalisawe.myartsonline.com/pulse_code_modulation_notes.pdfIn PDF document text
    • http://tibutariwu.myartsonline.com/advanced_algebra_formulas.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_off0000ee3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE3F 5876 bytes
SHA-256: 1939365188007606aecc111d629067317715e20e19473e31899dc384b45a5219
font_01_sfnt_off0001023c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1023C 11012 bytes
SHA-256: a0d676ec1b5a189c4338038a9840c87a6d21d64820f0320430bb7f378d512ad8

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