Malicious PDF — malware analysis report

Static analysis result for SHA-256 b17c0d823b8d0315…

MALICIOUS

PDF

68.4 KB Created: 2021-03-07 11:36:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: f72bc3b2d7cea81b4c4f8387616b42b1 SHA-1: 469359fbcbef01606edef531cdcea87aa613d050 SHA-256: b17c0d823b8d0315e94a350e5b3b3642d62164f35fbaed290f5bcddef509e74f
126 Risk Score

Malware Insights

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

The PDF file is detected as malicious by ClamAV and an ML classifier, and contains numerous external URIs. One such URI, 'https://gimoguvi.ru/wix?keyword=heartmate+ii+lvad+operating+manual', is presented as the document's content, suggesting a lure to a potentially malicious site. The PDF's structure and the presence of many links indicate it functions as a link farm designed to redirect users, likely for phishing or malware delivery.

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://gimoguvi.ru/wix?keyword=heartmate+ii+lvad+operating+manual PDF link annotation
    • http://erkutungotu.com/jofosafujuwolav3i3xs.pdfIn PDF document text
    • https://poximixej.weebly.com/uploads/1/3/0/7/130776069/2386536.pdfIn PDF document text
    • http://bcpzonasegurape2-viabcp.com/jugoralodisodusipogikarurijd24.pdfIn PDF document text
    • http://repair-kvadrokopterov.ru/mevopebkj5g3.pdfIn PDF document text
    • http://mobile-media.moscow/wosipepenaroiwz1r.pdfIn PDF document text
    • http://wisecredit.info/microsoft_flight_simulator_x_mac_free5s7j6.pdfIn PDF document text
    • http://cmb-societe.com/pezadijanotudolugebesiofm.pdfIn PDF document text
    • https://rugovisatef.weebly.com/uploads/1/3/2/6/132682701/jugodovixexek_wuxutam.pdfIn PDF document text
    • https://volokosebu.weebly.com/uploads/1/3/4/8/134871595/8905814.pdfIn PDF document text
    • http://ig-socialmedia.xyz/tagelewomed40qm.pdfIn PDF document text
    • http://keepmaxi.space/meade_etx-60at_telescope_reviewsyfb3i.pdfIn PDF document text
    • http://webmastervlad.ru/tell_me_three_things_age_rating99qba.pdfIn PDF document text
    • http://probkin34.xyz/the_kingdom_of_god_is_within_you_and_all_around_youjdqlk.pdfIn PDF document text
    • http://vibolofisef.mywebcommunity.org/jejoxorunibesuvujuzo.pdfIn PDF document text
    • https://sijudunewofas.weebly.com/uploads/1/3/4/6/134696620/luxaf_mukipebe.pdfIn PDF document text
    • https://limisakaxenit.weebly.com/uploads/1/3/4/3/134371081/03927ef96.pdfIn PDF document text
    • https://rotemewan.weebly.com/uploads/1/3/1/3/131380756/8653122.pdfIn PDF document text
    • http://xepuxupipe.mywebcommunity.org/jegigod.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a257d4c5-2adc-4261-a4a0-54652773e3c5/levusovuwubagojor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c55975b0-c9d3-4869-becd-5518067fe66d/rca_voyager_3_tablet_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e6a8dad-e13b-43cb-98a5-4c4d6e489ad6/81604806440.pdfIn PDF document text
    • http://pozidijapepore.atwebpages.com/wireless_n_repeater_setup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65928d9e-df60-4687-8d6a-6fe00af0da23/gowarelokabesetakumurevap.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_off0000cff1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFF1 5124 bytes
SHA-256: f07a2972dfb24dd3b9850627eccaf2580188b6527f7b17a92e458b32912dc7cf
font_01_sfnt_off0000e14e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE14E 10228 bytes
SHA-256: c34edde31e2d48dfabd424ff474bf6cc3e5d4dfc87668893dd866968818095e8

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