Malicious PDF — malware analysis report

Static analysis result for SHA-256 759e1683e3ac6d62…

MALICIOUS

PDF

75.9 KB Created: 2021-02-26 23:12:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 12982e94b39a1c5a38731839c483edf2 SHA-1: 9e4bf00d57146b0c71b33803397ed5cd09f67abf SHA-256: 759e1683e3ac6d6201b7e0a38f0800126a37a425fedac75a7603f159e72f8a8c
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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://maypoin.ru/strik?utm_term=engineering+science+and+mechanics+salary PDF link annotation
    • http://befotuke.mywebcommunity.org/nowadizifafiritife.pdfIn PDF document text
    • https://repotadidutu.weebly.com/uploads/1/3/4/3/134310826/vizilubijitiraxup.pdfIn PDF document text
    • http://jabilevij.mypressonline.com/what_temperature_should_my_whirlpool_fridge_be_at.pdfIn PDF document text
    • http://vuvulusigi.scienceontheweb.net/74263283206.pdfIn PDF document text
    • https://cdn.sqhk.co/tujarazimok/vifjeij/modern_arcade_games_emulator.pdfIn PDF document text
    • https://cdn.sqhk.co/zowonefaso/vCjhhdF/71167809894.pdfIn PDF document text
    • https://cdn.sqhk.co/sifalavuxozo/ijfLuxq/hungry_dragon_mod_apk_1._33.pdfIn PDF document text
    • https://digokevun.weebly.com/uploads/1/3/4/7/134747151/tugadafedo.pdfIn PDF document text
    • http://vufajed.getenjoyment.net/how_much_do_esl_online_teachers_make.pdfIn PDF document text
    • https://cdn.sqhk.co/kixagixupo/jhafgiu/dipijoli.pdfIn PDF document text
    • https://lurafavef.weebly.com/uploads/1/3/0/8/130813461/62158e4368d689.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lumixi/mesotelioma_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/navoburarovada/obsessed_movie_beyonce_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bibejovixapis/85954684416.pdfIn PDF document text
    • http://nabenejajoko.myartsonline.com/nasb_vs_nkjv.pdfIn PDF document text
    • http://jozobudesurarab.onlinewebshop.net/is_the_powerstroke_6.0_a_good_engine.pdfIn PDF document text
    • https://s3.amazonaws.com/lejivugeleguwod/yearly_schedule_template_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/vinejivunitego/amylase_activity_assay.pdfIn PDF document text
    • https://s3.amazonaws.com/foneniz/4053768429.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/pibupefid.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/26383462199.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA2E 5412 bytes
SHA-256: 2dda85cddf233c3397e3712bd4d8ef70226c133f431771967a98548d243b817c
font_01_sfnt_off0000fc7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC7E 10916 bytes
SHA-256: 31d841e827b41a0b4b2dcff5e0649dcca0bf2388bce0bdd335548538399f9bc0

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