Malicious PDF — malware analysis report

Static analysis result for SHA-256 86f01c231337a562…

MALICIOUS

PDF

84.3 KB Created: 2021-04-02 02:18:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 5f9aec59ced07e122bf1eff46ff36e80 SHA-1: 87815de02a64f9102db5e0bb86cc0d1b083530f6 SHA-256: 86f01c231337a56216bbd7e0b265261443caff937b5e841ae5857940aece808a
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically identified as a link farm on disposable hosting and another pointing to a URL with a 'keyword' parameter suggesting a phishing or scam lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the presence of numerous external links suggests an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/award?keyword=gluconato+de+sodio+pdf PDF link annotation
    • http://widaxaruko.mypressonline.com/53920024295.pdfIn PDF document text
    • https://cdn.sqhk.co/zitibidino/8jcuaOq/31112721661.pdfIn PDF document text
    • http://instapriz365.site/forarudigebufumagafafuvzleer.pdfIn PDF document text
    • http://findonelove.online/driver_updater_free_for_pcv5eku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387814/normal_605ee3d62edfd.pdfIn PDF document text
    • http://kotudekudoges.getenjoyment.net/abstract_algebra_david_dummit.pdfIn PDF document text
    • https://cdn.sqhk.co/lexelinowe/zicgdjc/zafadizi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451545/normal_603399f608d6a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475864/normal_5fd08a1650815.pdfIn PDF document text
    • https://cdn.sqhk.co/mesafovojifo/0ibieEm/lion_running_speed_km.pdfIn PDF document text
    • https://cdn.sqhk.co/bisozowinala/ijCwRmn/scrabble_word_finder_app_download.pdfIn PDF document text
    • http://acgmgroup.ru/wampum_belt_templatennpfc.pdfIn PDF document text
    • https://cdn.sqhk.co/tisorobew/jieuijk/jutuvijinezufiwep.pdfIn PDF document text
    • https://cdn.sqhk.co/valujoper/iJvaid5/17270300631.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454541/normal_603ff1d452c01.pdfIn PDF document text
    • http://ranupila.mywebcommunity.org/15497683595.pdfIn PDF document text
    • https://cdn.sqhk.co/gagobuniponi/jdmjdgf/change_eye_color_in_photo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470552/normal_600d248a7ccd2.pdfIn PDF document text
    • https://cdn.sqhk.co/ruzudulo/gf4idgh/benafitadiwab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kavibajegis.onlinewebshop.net/kadibake.pdfIn PDF document text
    • https://s3.amazonaws.com/zosevid/cuantos_pie_tiene_un_metro_cuadrado.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/detozimaj.pdfIn PDF document text
    • https://s3.amazonaws.com/kafises/adobe_acrobat_dc_manual_update.pdfIn PDF document text
    • https://s3.amazonaws.com/wukevirenesu/nc_drivers_license_renewal_grace_period.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A1 5084 bytes
SHA-256: eafe4d62ddaa69ce864e98de802090b017ccb7d89f1d52dce810cb424f5bbd9e
font_01_sfnt_off00010207.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10207 13608 bytes
SHA-256: a7834d911dd809baf891eb92954bb38559dbbab6ec624538f76060f7c6b89dfe
font_02_sfnt_off00012c0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C0E 16260 bytes
SHA-256: b1b93bf558ee65cf174bdde98fc70b39c77ddcfeef9d3a00758a58eb2f24951c