Malicious PDF — malware analysis report

Static analysis result for SHA-256 c29289939ee3e7fc…

MALICIOUS

PDF

70.4 KB Created: 2021-03-02 20:47:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 9c5656b399e37e1e0ca0534c9c4f4b78 SHA-1: d7b2be47790238ea5875e63559d4afd28bc8dcee SHA-256: c29289939ee3e7fcd16d8e9d9e9a5c04c89d65003cf574e9ef9c383d60d1cb6c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains a large number of external links, many pointing to potentially malicious domains, indicating a link farm or SEO spamming operation. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the PDF structure and numerous external URIs are indicative of an attempt to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://botokaw.ru/award?keyword=husky+372+big+bore+kit PDF link annotation
    • https://jazawimap.weebly.com/uploads/1/3/5/3/135346256/pubezolek-fofet-gesorumel.pdfIn PDF document text
    • https://disadoxamegipu.weebly.com/uploads/1/3/4/5/134527150/429d07557616c.pdfIn PDF document text
    • http://fegimikerekela.22web.org/geographical_information_system_notes.pdfIn PDF document text
    • http://mopomelodow.iblogger.org/tanapemeduvan.pdfIn PDF document text
    • https://sajoviginuxux.weebly.com/uploads/1/3/2/7/132712139/bomatobepi.pdfIn PDF document text
    • https://rinotawobuv.weebly.com/uploads/1/3/4/7/134768279/1952fb9034f.pdfIn PDF document text
    • https://mevavenepid.weebly.com/uploads/1/3/1/6/131637679/1661712e81085b2.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/nutanigonu/crockpot_the_original_slow_cooker_temperature_settings.pdfIn PDF document text
    • https://s3.amazonaws.com/wezukep/89742244306.pdfIn PDF document text
    • https://s3.amazonaws.com/jexijer/responsive_image_carousel_jquery_free.pdfIn PDF document text
    • https://s3.amazonaws.com/lulelepese/34378654966.pdfIn PDF document text
    • http://bogukap.rf.gd/lipid_bilayers_form.pdfIn PDF document text
    • https://s3.amazonaws.com/midizaxopazeji/4989588022.pdfIn PDF document text
    • https://s3.amazonaws.com/ravuxudibure/ions_in_chemical_compounds_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/setaxilitozuko/how_to_change_my_kenmore_fridge_water_filter.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/acronis_2015_trial.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzed/65325993527.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/bidesomulabo.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/29577535758.pdfIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/fuvijuzumifud.pdfIn PDF document text
    • http://buzaduvopixu.rf.gd/all_the_bright_places_character_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/jinotugiwomo/92776163243.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_off0000d5c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5C8 5252 bytes
SHA-256: 12451443e08188cb7f76a4e58077c57573095c67288693c2a4745ba260dd248a
font_01_sfnt_off0000e7d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D0 10828 bytes
SHA-256: 7837b8d364ac57c6ebfbd2c7dd7de338fc77bc80b61c10129762b53e7ba54761

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