Malicious PDF — malware analysis report

Static analysis result for SHA-256 44fb45dcf0da449f…

MALICIOUS

PDF

78.4 KB Created: 2021-03-22 06:19:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 3102715bd588e820918ca1eede0bf1a6 SHA-1: 9bb3a72e6bd6c4d7126cf02f1eafb41b78dd73a9 SHA-256: 44fb45dcf0da449f1d3168ae00b8228410320548243c9f3955f3d61eca0e072d
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, indicating it functions as a link farm. The presence of a ML classifier flagging it as malicious and ClamAV detecting it as 'Pdf.Phishing.Trojan' strongly suggests malicious intent. The embedded URLs likely lead to phishing sites or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 6

  • 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.
  • 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://pelibifir.ru/wix?keyword=vox+ac15+tbx+manual PDF link annotation
    • https://zosupexaduj.weebly.com/uploads/1/3/0/7/130738593/73e90.pdfIn PDF document text
    • https://movalibixijol.weebly.com/uploads/1/3/2/6/132682530/3229745.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392215/normal_5fe07ce5aa87c.pdfIn PDF document text
    • https://lamosafobe.weebly.com/uploads/1/3/5/3/135322951/sigajinajebije-dubewerudogabur-pejewege.pdfIn PDF document text
    • http://jobware.pro/2657257578450pbp.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448551/normal_60050c62745cb.pdfIn PDF document text
    • http://bachanalytics.com/201675109435ihav.pdfIn PDF document text
    • http://urolog.xyz/the_way_of_the_shaman_quotesq3y48.pdfIn PDF document text
    • https://cdn.sqhk.co/fowipovoji/btIe8bZ/95661346779.pdfIn PDF document text
    • https://rogujodur.weebly.com/uploads/1/3/4/8/134899240/2472644.pdfIn PDF document text
    • http://pirawamajakemiv.22web.org/because_of_winn_dixie_weekly_test.pdfIn PDF document text
    • https://cdn.sqhk.co/rubovadu/jcijicw/8499728635.pdfIn PDF document text
    • https://buwofapakudo.weebly.com/uploads/1/3/5/3/135316190/4367316.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427295/normal_5ffba6bc2df21.pdfIn PDF document text
    • https://kokobeze.weebly.com/uploads/1/3/4/6/134605009/6630428.pdfIn PDF document text
    • https://wurixexaf.weebly.com/uploads/1/3/4/8/134865586/nanexukev.pdfIn PDF document text
    • https://cdn.sqhk.co/lekifuwixal/tgdhcgi/91760743874.pdfIn PDF document text
    • https://vesumuzuvof.weebly.com/uploads/1/3/4/6/134685641/feb0889361ca1.pdfIn PDF document text
    • https://vuloribogisoso.weebly.com/uploads/1/3/4/6/134655424/9616315.pdfIn PDF document text
    • http://marinarus.space/90802530153izj05.pdfIn PDF document text
    • http://reactivaperu-2020.com/fuvatifexifulumigibopejajlde4.pdfIn PDF document text
    • https://cdn.sqhk.co/dixejetafap/djegihj/lemefoka.pdfIn PDF document text
    • https://cdn.sqhk.co/runudori/ngck2Q9/kick_the_buddy_apk_android_oyun_club_indir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366374/normal_604d2afedd87d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372376/normal_5ff1db9eeea73.pdfIn PDF document text
    • http://www.voxshowroom.com/uk/amp/ac15tbx_manual_p1.htmlIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jebebubijegew.rf.gd/manual_capsule_filling_machine_principle.pdfIn PDF document text
    • http://fuxufotab.epizy.com/pagug.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_off0000f686.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF686 5020 bytes
SHA-256: 4d20de67e10798e265d5c5a0ff68fac3b04dfad6ef5557fbca44e2d8755e15a2
font_01_sfnt_off000107a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107A1 10728 bytes
SHA-256: 64dff2dc404a189caf9464bac1d7c11b52cbd52bfcf8c5e268f6c4ad2d4e3c72