Malicious PDF — malware analysis report

Static analysis result for SHA-256 f12a47a608db2292…

MALICIOUS

PDF

88.4 KB Created: 2021-09-22 12:56:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 770d6bdaab42ee4dc760b7e475d49493 SHA-1: 263211e5abfe74147bd78189462e4dcd203ad860 SHA-256: f12a47a608db229243d1e806a988e548bf78287a3a0c7ae77350838d597f1d0d
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which are hosted on disposable domains, indicating a link farm for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to trick users into downloading a simulator or other malicious software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://ever-pioneer.com/upload/files/13283718191.pdf In PDF document text
    • http://hotelbasantresidency.com/uploads/41288462104.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145f499ad94c---wuwesuxera.pdfIn PDF document text
    • http://obraz-tlt.ru/userfiles/file/zosijegulewa.pdfIn PDF document text
    • http://huntland.hu/upload/file/tugivinokokasafow.pdfIn PDF document text
    • https://webshopplus.nl/app/webroot/files/userfiles/files/24029844105.pdfIn PDF document text
    • http://atomicattack.com/atomic/fckimages/file/dimikopinufatekesagowa.pdfIn PDF document text
    • https://bharatbiodiesel.com/userfiles/file/ribikonuzewuzek.pdfIn PDF document text
    • https://vcubusinesssolutions.com/userfiles/file/witidug.pdfIn PDF document text
    • http://thankschicken.com/uploads/files/wunadujozirobironuma.pdfIn PDF document text
    • http://virtuozi.ru/sites/all/sites/virtuozi.ru/files/20052198571.pdfIn PDF document text
    • http://miryangpension.com/FileData/ckfinder/files/20210919_652B9DEAC7BFC18C.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/5999647066.pdfIn PDF document text
    • https://korankertas.com/contents/files/dopukujagimamejesidori.pdfIn PDF document text
    • http://8njl.com/userfiles/files/1777921220.pdfIn PDF document text
    • http://malir-naterac.info/UserFiles/File/mijefoxudin.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/vp9q55vcpfllauan94cq24qri0/petivixopesosegosabamimof.pdfIn PDF document text
    • https://pastravariaizvoarelebratiei.ro/images/file/fosajojexeranowirimozubib.pdfIn PDF document text
    • http://machi-tomo.xyz/js/ckfinder/userfiles/files/20397625271.pdfIn PDF document text
    • https://pmsp-me.com/userfiles/files/93966790618.pdfIn PDF document text
    • https://ermolino.mebel18.com/uploads/files/65220756088.pdfIn PDF document text
    • http://gramercygrand.ru/files/file/18010204853.pdfIn PDF document text
    • http://edins.net/userData/ebizro_board/file/sapowinosegamoregifu.pdfIn PDF document text
    • http://sarljarry.com/userfiles/file/koziburu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=download+simulator+android+pcPDF link annotation
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c7c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7C4 16244 bytes
SHA-256: fddcbe21bdf9fb2753729b4ab5b26d7a3fbb01e3fe51d41ab0725360e25c189d
font_01_sfnt_off0000ddae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDAE 23548 bytes
SHA-256: 7997b68c13c1d962a93993984e98f822f9ffb79a64e2ff3af924187bc14a2189
font_02_sfnt_off00011952.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11952 10728 bytes
SHA-256: 6f92c1a2cfe232d37570f7bafad373aebf5e1c378df926355dfb2e1e7c5eeafd
font_03_sfnt_off00013202.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13202 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off00014a0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A0F 1820 bytes
SHA-256: ef4c56b83544acc0eae329b123dcb13384a4443b8ee25b6b011fcec9f25c534c