Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeef7c7c834d705d…

MALICIOUS

PDF

89.1 KB Created: 2021-03-20 05:00:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 127f886ff1cb2f73d374e7887425c61b SHA-1: 769c94a89c90eef3e5736d105d28be88400fbdb1 SHA-256: eeef7c7c834d705d8af8bdaccc4e0865772fc57ff5b6c2791836cf319bff34a1
186 Risk Score

Malware Insights

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

The PDF file contains a link farm designed to redirect users to various PDF downloads, masquerading as a resource for "countries capitals and currencies pdf download". The presence of numerous external links, many hosted on disposable domains, and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicate a phishing or malicious content distribution scheme. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to distribute malware or lead users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://xajibur.ru/award?keyword=countries+capitals+and+currencies+pdf+download PDF link annotation
    • https://mofibowego.weebly.com/uploads/1/3/1/4/131406437/35fc4e16221d.pdfIn PDF document text
    • https://cdn.sqhk.co/mujawiru/DgjhjTc/super_mano_jungle_adventure_cheats.pdfIn PDF document text
    • https://cdn.sqhk.co/vigefifobot/gghifij/mr_huie_american_ninja_warrior.pdfIn PDF document text
    • https://cdn.sqhk.co/fezavomol/2genAhj/polite_magic_word_crossword_clue.pdfIn PDF document text
    • https://cdn.sqhk.co/lanasido/4uhbtnx/7613932566.pdfIn PDF document text
    • https://munejubulogulep.weebly.com/uploads/1/3/4/2/134266186/e5b414a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385030/normal_60073c538a765.pdfIn PDF document text
    • https://cdn.sqhk.co/jajejige/bMjaiiz/84519617540.pdfIn PDF document text
    • https://jojobejuw.weebly.com/uploads/1/3/2/8/132815094/kawibafogadef_wuvegizokalavo.pdfIn PDF document text
    • https://pinozawekik.weebly.com/uploads/1/3/4/5/134589254/kebuke-widisisalama.pdfIn PDF document text
    • https://tivepikilusu.weebly.com/uploads/1/3/4/7/134759048/xawopitogoga.pdfIn PDF document text
    • https://cdn.sqhk.co/xasurila/HjhMGX9/44623516850.pdfIn PDF document text
    • https://cdn.sqhk.co/botikavanov/QLUgijg/kaxosewerajosadixaj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391634/normal_5fefbe1c6976e.pdfIn PDF document text
    • https://cdn.sqhk.co/fusexabuvej/hjc1iiA/unscramble_word_cheat.pdfIn PDF document text
    • https://cdn.sqhk.co/vovewotutal/jeRhiJC/messenger_download_for_chromebook.pdfIn PDF document text
    • https://cdn.sqhk.co/votojuxosaf/iMxhd0t/xejeb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381091/normal_5fccb4cf9133b.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/fea79a87-554e-4e53-b069-73caf25252c6/dell_latitude_e6540_battery_97wh.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a54ab35-72af-4577-8443-9389fa869fee/73913744394.pdfIn PDF document text
    • http://surofavuvaxono.epizy.com/vogip.pdfIn PDF document text
    • http://kotasogova.rf.gd/15266824537.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9e11bbf-8727-42fd-b895-59b82c20f910/84184625383.pdfIn PDF document text
    • http://vadudax.epizy.com/what_is_the_best_outdoor_motion_sensor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aeeede11-62f1-45b9-8a62-d11a7209b834/convert_graco_crib_to_toddler_bed.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_off00011a79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A79 5148 bytes
SHA-256: 8f295ba01ef49f5375ed4d3a24d67f93014b9c35a3353e3974de6c4dc24a3822
font_01_sfnt_off00012c1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C1B 14240 bytes
SHA-256: 91736df1d0f5cbdf9c096108e46a265e551600b332d984bf106107cc38cd819d