Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d575cb180ed6ae1…

MALICIOUS

PDF

81.6 KB Created: 2021-02-20 22:56:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 2e6cc1e249c6deac25607d20dcee9f5a SHA-1: 43cb706a73faf579fc00a578c963dbdda658a9f9 SHA-256: 0d575cb180ed6ae17c2ee8a3c3acba0084f34433471494d15ac9b9cf833cf7b7
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by both ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, appears to be a lure related to Italian language exercises, likely intended to disguise the malicious intent of redirecting users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://maypoin.ru/strik?utm_term=italiano+imperfetto+o+passato+prossimo+esercizi PDF link annotation
    • https://fixemebipufuw.weebly.com/uploads/1/3/4/1/134131586/bivix_vebesibosi_jumerafi_jugivenepu.pdfIn PDF document text
    • https://weraxugunelega.weebly.com/uploads/1/3/4/7/134719696/xinuxunobabedo.pdfIn PDF document text
    • https://savatevadenu.weebly.com/uploads/1/3/1/4/131452836/0dc53280.pdfIn PDF document text
    • https://tufelonidozuwux.weebly.com/uploads/1/3/2/6/132681512/7163959.pdfIn PDF document text
    • https://nokaxogu.weebly.com/uploads/1/3/4/5/134520383/98d814.pdfIn PDF document text
    • https://xekukagakodepa.weebly.com/uploads/1/3/3/9/133999272/7985585.pdfIn PDF document text
    • https://cdn.sqhk.co/budijapa/fK14heB/9th_grade_world_history_book_florida.pdfIn PDF document text
    • https://daxodewime.weebly.com/uploads/1/3/1/3/131398188/df0d96cd7584f5b.pdfIn PDF document text
    • http://zawugexoj.22web.org/template_kaos_polos_lengan_panjang_depan_belakang.pdfIn PDF document text
    • https://kopomitesukov.weebly.com/uploads/1/3/1/4/131453216/7966677.pdfIn PDF document text
    • https://bozelisu.weebly.com/uploads/1/3/2/6/132695328/36658eca53.pdfIn PDF document text
    • https://cdn.sqhk.co/tinodifozeza/hihqjbF/learning_spanish_in_spain_vs_latin_america.pdfIn PDF document text
    • https://romugazasemagop.weebly.com/uploads/1/3/4/8/134897733/4186459.pdfIn PDF document text
    • https://cdn.sqhk.co/kolokejo/aogiagj/crazy_pumpkins_ideas.pdfIn PDF document text
    • https://cdn.sqhk.co/wiwokosokif/iaRThcI/hero_xtreme_200s_bs6_mileage.pdfIn PDF document text
    • https://pewarefat.weebly.com/uploads/1/3/4/3/134361746/2014014.pdfIn PDF document text
    • https://mizewipexu.weebly.com/uploads/1/3/4/6/134609608/7864874.pdfIn PDF document text
    • https://cdn.sqhk.co/kizafizutuw/j0khegq/ww2_polygon_offline.pdfIn PDF document text
    • https://cdn.sqhk.co/lukupupiba/Lhdbl1X/csr_classics_ios_hack_download.pdfIn PDF document text
    • https://nokojuponamipi.weebly.com/uploads/1/3/4/8/134891784/6229158.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zumaborelap.rf.gd/authentic_happiness_martin_seligman.pdfIn PDF document text
    • http://tukudapig.epizy.com/xofizilelijad.pdfIn PDF document text
    • http://mudotepejix.epizy.com/kamivukijewivumafe.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e84a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE84A 5148 bytes
SHA-256: 490a20f40d77b9cd1e1010f1ef526efe118b08daa4f7486a82cbbb904976ad44
font_01_sfnt_off0000f9bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9BF 12312 bytes
SHA-256: 9255509eeb10457bd1f298fa3be2923dc505b321d704579695f187b1a079b6c3
font_02_sfnt_off000121c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121C4 16516 bytes
SHA-256: 27397e4e4f67c8ecc1ff96096eee1de536c4ad48fb3347f6b870be6c1fcada41