Malicious PDF — malware analysis report

Static analysis result for SHA-256 a14678673ae16884…

MALICIOUS

PDF

72.2 KB Created: 2021-03-18 13:01:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 6f8bf70a2d5d4f5a731461d4bdb519e0 SHA-1: 7de1dc141556c2fd8864f889723c13251552e091 SHA-256: a14678673ae168848fbf5e480aeb632ca94f1408d181ea29f56f5a1ba93730af
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classification and ClamAV, flagging it as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially malicious sites. The presence of external URIs and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://mezovuduw.ru/wix?keyword=farmall+a+shop+manual PDF link annotation
    • https://cdn.sqhk.co/linotepibubi/jDBiijb/cardiopulmonary_bypass_principles_and_practice_free.pdfIn PDF document text
    • https://raxagipob.weebly.com/uploads/1/3/4/8/134883443/dekuvapexifedetotus.pdfIn PDF document text
    • https://cdn.sqhk.co/zupisopad/gejeiiL/guvif.pdfIn PDF document text
    • https://jubekufolofifi.weebly.com/uploads/1/3/4/5/134593927/5071426.pdfIn PDF document text
    • https://cdn.sqhk.co/wijelukifap/5lIGicd/60711326175.pdfIn PDF document text
    • https://cdn.sqhk.co/zikonidenijo/7hjje3T/xagimimusamivimarazuvunob.pdfIn PDF document text
    • https://cdn.sqhk.co/vimexuda/ydhfLFN/rikepodirinodidim.pdfIn PDF document text
    • https://cdn.sqhk.co/penutizufib/hf5sifk/master_system_emulator_mac_os.pdfIn PDF document text
    • http://gasomenuza.iblogger.org/koveki.pdfIn PDF document text
    • https://cdn.sqhk.co/jovowosifo/gujgjdQ/galaxie_mineral_spring_ave.pdfIn PDF document text
    • https://cdn.sqhk.co/gejupajo/ijmZjd1/2140393956.pdfIn PDF document text
    • https://cdn.sqhk.co/gitogozune/gGCkif2/tiny_dice_dungeon_pc.pdfIn PDF document text
    • http://wofomeko.22web.org/animal_word_search_printable.pdfIn PDF document text
    • https://mabobuloxulekev.weebly.com/uploads/1/3/4/6/134692970/tirajefutu_zojefujetir_fokidinakugu_zadiwelavebo.pdfIn PDF document text
    • https://cdn.sqhk.co/budotedo/hphdjbW/mera_shankar_bhola_bhala_song.pdfIn PDF document text
    • https://cdn.sqhk.co/sanojuxako/EjBijgx/boxing_fighter_arcade_game_for_rent.pdfIn PDF document text
    • https://cdn.sqhk.co/vewukiziwemi/MjaCifu/7455447241.pdfIn PDF document text
    • https://cdn.sqhk.co/jepivitixiwo/gfjf850/mapibutaxilo.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/dee01840-8460-4650-a003-96998aedf122/different_biomes_in_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/314bdfe2-a07e-4199-9d00-63903fa9e208/gubixodi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f768d22f-f407-4a91-8c6f-c64eb80b059b/free_willy_streaming_italiano.pdfIn PDF document text
    • http://mimiwuzoxul.epizy.com/24066566280.pdfIn PDF document text
    • http://kasamikapumumo.epizy.com/dusedofenuwoxewova.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1bfac20-f18b-4ad8-bfc8-c74b61db2c78/senior_machine_learning_engineer_salary_bay_area.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_off0000dd21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD21 5012 bytes
SHA-256: dab5619f4c29069cddc6c64408006b295e148f7fb3d2e41cbc29072971af021b
font_01_sfnt_off0000edfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFE 10988 bytes
SHA-256: 89bbad5cf5d8692cc16133d8890fb960aa6d36a7ce7ce62a6f7a18d140062224