Malicious PDF — malware analysis report

Static analysis result for SHA-256 064583a576121e42…

MALICIOUS

PDF

84.5 KB Created: 2021-02-18 14:01:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 5bf7547de5c7c98068ae662456cf53bf SHA-1: 256c4481c28c620e9b20a8cd3a269f1c8995a38f SHA-256: 064583a576121e422ccbea1f1a77eab60ff29dca952f38e38deb5dbf6ea07eef
126 Risk Score

Malware Insights

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

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains and link farms, suggesting an attempt to redirect users to malicious sites. The presence of external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicate a likely phishing or malware distribution scheme.

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 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://bologen.ru/aws?utm_term=which+harry+potter+book+has+sold+the+most PDF link annotation
    • https://cdn.sqhk.co/sunomedude/AHieVP2/i_need_to_speak_to_your_manager_meme.pdfIn PDF document text
    • http://tanuwoxomasosog.22web.org/minecraft_1._12_free_cracked.pdfIn PDF document text
    • https://cdn.sqhk.co/kagelemovo/jQjhcif/how_to_iron_perler_beads_without_wax_paper.pdfIn PDF document text
    • https://cdn.sqhk.co/tatogevi/gjg8hg4/zombie_apocalypse_survival_experience_london.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451742/normal_5fcbfe97ec9f3.pdfIn PDF document text
    • https://cdn.sqhk.co/jagibuvat/ghygfjh/weathertech_desk_phone_walmart.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464078/normal_5fffb8f75385d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454681/normal_600b99235d32a.pdfIn PDF document text
    • https://cdn.sqhk.co/sepufaziru/Oichehd/146164874.pdfIn PDF document text
    • https://cdn.sqhk.co/tedogegez/ogeieCD/win_liar_s_dice_red_dead_redemption.pdfIn PDF document text
    • https://cdn.sqhk.co/dabozijide/Dyjejdx/19494764707.pdfIn PDF document text
    • http://hookup154.fun/db2_sql_error_sqlcode_104_sqlstate_426016wo2l.pdfIn PDF document text
    • https://cdn.sqhk.co/sefibenip/gvhh5vS/82647625391.pdfIn PDF document text
    • https://cdn.sqhk.co/xuzalolotagi/gcaeLlu/reverevuxigagaduzu.pdfIn PDF document text
    • https://cdn.sqhk.co/wejagamewo/d8vgijb/super_hexagon_ios_download.pdfIn PDF document text
    • http://zelafagilu.iblogger.org/lebesilodixodawelunarasiv.pdfIn PDF document text
    • https://cdn.sqhk.co/dedizajo/fhdYloW/east_new_york_post_office_phone_number.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tozurome.epizy.com/22086371840.pdfIn PDF document text
    • http://maxefaronuxugur.epizy.com/tumuputiporowas.pdfIn PDF document text
    • http://pugapugene.rf.gd/xufuburarakenokuz.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e579.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE579 6588 bytes
SHA-256: fa72874b8c381873b432d3b5cea9ecddba20f04e8e1c9face7d560df1136061a
font_01_sfnt_off0000f5f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F3 5632 bytes
SHA-256: cff2ccfcd4e2cc56320f3be0072e9f6efb06f67fb34bd6a2f5ff7a1bab739c6f
font_02_sfnt_off000108fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108FC 11056 bytes
SHA-256: 947dcd4506de507f9767b05d1dd1ec9a98cb36da01df586370da6fcdb1d59c30
font_03_sfnt_off00012ed5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ED5 16120 bytes
SHA-256: c94926d5202b085e184a5666363eda0a421a0de498e0fbda8ae973291059b9dc