Malicious PDF — malware analysis report

Static analysis result for SHA-256 08794f30400c7245…

MALICIOUS

PDF

81.5 KB Created: 2021-09-15 09:51:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 133f6de9c311236e74e64b6da7e2d2c6 SHA-1: 7d27c32a7a5044315decb140ca41fb9b0bcd8d18 SHA-256: 08794f30400c724538dfa8dae843439b4a17de2c39bca8bce960608da82773b1
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to potentially malicious or phishing sites, suggesting a lure for users to visit these external resources. The PDF structure and the presence of external URIs are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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 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://drafthe.ru/uplcv?utm_term=bully+save+data+android PDF link annotation
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/161323a1f44c5d---gibuba.pdfIn PDF document text
    • https://rtquery.reitoken.org/Coaching123/images/files/14216128399.pdfIn PDF document text
    • https://kakakmanis.com/contents/files/16460760417.pdfIn PDF document text
    • http://primaria-ciocirlia.ro/media/file/dodokamovekopisigigemisem.pdfIn PDF document text
    • http://haisushitogo.com/uploads/files/99982147428.pdfIn PDF document text
    • http://escuelasfutbol8.com/docs/files/91348919705.pdfIn PDF document text
    • http://hoachattn.com/image/files/63342673266.pdfIn PDF document text
    • http://naosgym.com/userfiles/files/99749346921.pdfIn PDF document text
    • http://nkmate.com/FileData/ckfinder/files/20210904_1B26287F05875F7A.pdfIn PDF document text
    • http://katachizu.com/img/news/files/wepaxoniluvipotoxopivuvom.pdfIn PDF document text
    • http://ogcdc.org/uploads/ck_upload/files/palupidofi.pdfIn PDF document text
    • http://johnmarzillier.com/ckfinder/userfiles/files/dafibobasofejuvo.pdfIn PDF document text
    • https://receptabc.hu/images_banner/files/samumukulituwija.pdfIn PDF document text
    • http://paradoxine.com/upload/files/matawagematatosut.pdfIn PDF document text
    • http://srtcivilnorth.com/ckeditor_file/files/jonilu.pdfIn PDF document text
    • http://studiozammuner.eu/userfiles/files/suzufibuxa.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130e4610d0fc---89634723756.pdfIn PDF document text
    • http://zopos.zohukum.com/ckfinder/userfiles/files/55128376109.pdfIn PDF document text
    • http://nj-rshb.com/v15/Upload/file/202193182202454.pdfIn PDF document text
    • http://machinesupplier.cn/data/product/file/2021914_71222_535.pdfIn PDF document text
    • https://perfecthospitals.com/ckfinder/userfiles/files/xurudajosebiwit.pdfIn PDF document text
    • https://pasarangroup1.com/contents/files/10899720655.pdfIn PDF document text
    • https://moyaexpresss.com/ckfinder/userfiles/files/fusapanogavifigeborafajor.pdfIn PDF document text
    • http://grimastone.ru/files/48055719324.pdfIn PDF document text
    • https://shoppe.everybodyisnotdoingit.org/gift/userfiles/files/90819209171.pdfIn PDF document text
    • https://livewireeventz.com/userfiles/file/semofokatupegozaxej.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://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_off0000d524.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD524 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ed36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED36 19100 bytes
SHA-256: 06c4e7d6907c430888878a7c5fb7b684b0a9bf9d027392fd46dc27dec15604cd
font_02_sfnt_off00011fcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FCD 10576 bytes
SHA-256: e9be67737217b75e1cdadbbb5ff1343d39a2ac1974030a7ba9d425ead17435ac