Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f9c4d5d14c1ad4b…

MALICIOUS

PDF

96.8 KB Created: 2021-05-09 15:00:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: fc6521c1f69c8f9ebd5b9e9d8eb9b38f SHA-1: 1b7ce416e60bc75ea2a23aaacfd194ed3753f298 SHA-256: 5f9c4d5d14c1ad4bb77899319aece4eb0844cd98b5a0dc8cbd11d7d471629873
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 0.9969

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 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://dugedepap.ru/strik?utm_term=what+is+the+moral+of+freak+the+mighty PDF link annotation
    • https://zoforute.weebly.com/uploads/1/3/4/3/134352948/0666167.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426812/normal_5ff81d640f608.pdfIn PDF document text
    • http://bajesiradevo.getenjoyment.net/bangla_english_grammar_book.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391024/normal_6001fa7ba5105.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491723/normal_5fee6d839435d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450723/normal_5fdf0e587dfd4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413585/normal_5feeaaaeeb594.pdfIn PDF document text
    • https://wuwiragirek.weebly.com/uploads/1/3/0/8/130874366/441b5d3793e.pdfIn PDF document text
    • http://wodekenizowa.getenjoyment.net/what_is_capped_brood_bees.pdfIn PDF document text
    • https://wotakowa.weebly.com/uploads/1/3/4/8/134885303/8660700.pdfIn PDF document text
    • http://lofiwivino.iblogger.org/free_60_day_keto_diet_plan.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/ziwuvijevo/tabela_fipe_do_kia_cerato_2011_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wemazun/tegovuwifepapu.pdfIn PDF document text
    • http://vawofirulev.myartsonline.com/blackjack_rules.pdfIn PDF document text
    • https://s3.amazonaws.com/nerugiraxura/group_theory_applications_in_computer_science.pdfIn PDF document text
    • https://s3.amazonaws.com/tugabijenovili/beauty_and_the_beast_screenplay.pdfIn PDF document text
    • http://rexenejo.epizy.com/casio_g-shock_ga-100cf-1a9dr_g519.pdfIn PDF document text
    • http://wusozupit.myartsonline.com/bio_power_plant.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifawuvawot/kemuba.pdfIn PDF document text
    • http://tizepadeda.rf.gd/adjetivos_en_ingles_vaughan.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/plato_republic_book_1_audiobook.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/super_vpn_pro_apkpure.pdfIn PDF document text
    • http://jerananixakuzeb.epizy.com/movaperumulimigevukoso.pdfIn PDF document text
    • http://ditanumugagoma.myartsonline.com/matasarofowinorolunewuve.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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDCB 6416 bytes
SHA-256: dc7ab62629aba76a2a1ae9c13196ab608952013a673348275611bf62f0f4ec9f
font_01_sfnt_off0000fd9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD9E 5360 bytes
SHA-256: 00685385d066a53effd0bef3526a6c6437501546705e408af0d40e5b34175d44
font_02_sfnt_off00010fbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FBB 10604 bytes
SHA-256: 98f28da0753892a91e68a5afd2f258b1def9a1c341b6eb2547578618e26d08ec
font_03_sfnt_off0001316c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1316C 10476 bytes
SHA-256: 066c7e546c892b833367bca96275f174b2bde975ecbb006953d7cde02bde2ce4
font_04_sfnt_off00015577.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15577 16256 bytes
SHA-256: 3fc654e6c44e5b5ea7dd8abc44003e33fd6308e4012022e1519ba6150b39c93b
font_05_sfnt_off00016ad3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16AD3 1736 bytes
SHA-256: 1648accd5638f26481c437d0e436fdfb03edab78dab75f4e73239278c8cddc19