Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4630e512c3afb85…

MALICIOUS

PDF

80.6 KB Created: 2021-03-15 11:33:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 1d06c421ee6c1f4f82a9a6acfa69c529 SHA-1: 303235259b789476dae5ddf69b7e9736fcc0aaf5 SHA-256: d4630e512c3afb85e8a04f728dceda93a5fb617b4a45c676a1af1206e41266c5
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs pointing to disposable domains and link farms, indicating a likely attempt to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it is designed to facilitate phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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 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://xezojetit.ru/wix?keyword=mackie+cfx+12+manuale+italiano PDF link annotation
    • https://cdn.sqhk.co/jisokemefaz/Oczsgid/zombie_castaways_secret_island.pdfIn PDF document text
    • http://dofujifeluradep.medianewsonline.com/free_crochet_patterns_for_blanket_squares.pdfIn PDF document text
    • http://pufemebulod.22web.org/59412628866.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428341/normal_602d54d186c52.pdfIn PDF document text
    • https://tagipuzato.weebly.com/uploads/1/3/0/7/130776724/gakux.pdfIn PDF document text
    • http://xepewifub.mygamesonline.org/the_wild_unknown_tarot_deck_and_guidebook_official_keepsake_box_set_book.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494430/normal_5fffe09ce345c.pdfIn PDF document text
    • http://potawuzaj.medianewsonline.com/38996945958.pdfIn PDF document text
    • http://xoxuvajes.mywebcommunity.org/ruger_air_hawk_elite_ii_.177_pellet_air_rifle.pdfIn PDF document text
    • https://cdn.sqhk.co/kawonidoza/idL3vji/two_dots_scavenger_hunt_october_2020_level_2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485942/normal_6003272e51fa3.pdfIn PDF document text
    • https://cdn.sqhk.co/leporolino/rhcjiOo/the_cheetah_atlanta_covid.pdfIn PDF document text
    • https://cdn.sqhk.co/mawetadu/WghjaMK/lewatuzofegiti.pdfIn PDF document text
    • https://zowololo.weebly.com/uploads/1/3/5/2/135294949/fb0409de7.pdfIn PDF document text
    • https://texifafotolatip.weebly.com/uploads/1/3/4/7/134764930/winiru.pdfIn PDF document text
    • https://vebilikowuti.weebly.com/uploads/1/3/2/7/132740371/72fa90aa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470683/normal_5fcfb0d19ebb9.pdfIn PDF document text
    • https://sulezesolujoseg.weebly.com/uploads/1/3/1/4/131452841/wugidizozuteri.pdfIn PDF document text
    • http://wejowadizabudex.mypressonline.com/97928941976.pdfIn PDF document text
    • http://mivegik.mygamesonline.org/que_es_un_absceso_dental.pdfIn PDF document text
    • http://ramuwesitavoz.mywebcommunity.org/80626599323.pdfIn PDF document text
    • http://zojidetamosab.iblogger.org/vafibibefotefesufabosaze.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vobozezojip.onlinewebshop.net/all_in_one_science_class_10_free_download.pdfIn PDF document text
    • http://rabatelekovufar.myartsonline.com/los_seores_del_narco_descarga.pdfIn PDF document text
    • http://xakufidadalajup.epizy.com/kamuza.pdfIn PDF document text
    • http://keladosa.epizy.com/ferifizasexuwinifowuf.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_off0000f762.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF762 5072 bytes
SHA-256: 8a3c614f11f3b13798f5fa6f2a51cacdec6efb7ce0bd9e3257d3601b633a0bbd
font_01_sfnt_off000108b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108B5 13132 bytes
SHA-256: d414d77b6e36329bff0d18ef16029e0c4705ea7cc3c94c056b4d80813731658f