Malicious PDF — malware analysis report

Static analysis result for SHA-256 57063b2f18558fcd…

MALICIOUS

PDF

79.2 KB Created: 2021-09-17 12:46:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 26b8c42c252b58cb5afeff3e95809fb3 SHA-1: e0c8354f65d2f5f66dc645509325f95dbe6d8d24 SHA-256: 57063b2f18558fcd351a40d127bdfc4dd687f4a328b1e4d0b8d2415c456ca2e6
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous embedded URLs that point to a link farm, suggesting an attempt to redirect users to malicious sites. The PDF structure and embedded URIs indicate a lure for users to click on these links, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://pixomot.ru/uplcv?utm_term=pokemon+randomizer+gba PDF link annotation
    • https://bbox.ru/images/shared/file/63930090798.pdfIn PDF document text
    • https://camping-du-lac-dijon.com/userfiles/fichiers/fenapa.pdfIn PDF document text
    • http://balcimimarlik.com/resimler/files/81416197373.pdfIn PDF document text
    • http://saddabro.com/userfiles/file/viputunovezud.pdfIn PDF document text
    • http://bualuang101.com/backoffice/upload/files/luvesidofifakana.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/a3b2931d99c9ffee64c16d6439586b9c/61181166973.pdfIn PDF document text
    • http://camelliafb.com/uploads/files/202109041021448489.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1613bb1e30c7ec---nanufapizovuzovorojitoxo.pdfIn PDF document text
    • http://belgium-ex.com/images/blog/file/46530326549.pdfIn PDF document text
    • http://dalboncostruzioni.it/userfiles/files/wiwikotosutilevunosegulop.pdfIn PDF document text
    • https://fratellifurloni.it/file/liketumuromadovotoxinufox.pdfIn PDF document text
    • http://antansconstructions.com/ckfinder/userfiles/files/87838176973.pdfIn PDF document text
    • https://maciejabramowicz.pl/upload/files/file/9814598134.pdfIn PDF document text
    • https://flcevent.fcu.edu.tw/plugin/ce1/ckfinder/userfiles/files/20210902041916.pdfIn PDF document text
    • https://cakesandcupcakes.net/userfiles/files/96556020545.pdfIn PDF document text
    • http://zlzljc.com/uploadfile/file///2021091602041570.pdfIn PDF document text
    • http://movitecnic.com/ressource/site-image/files/kufekivuteleguzunajeb.pdfIn PDF document text
    • http://victoryelectricalsupply.com/ckfinder/userfiles/files/11482925993.pdfIn PDF document text
    • http://imobiliariaimperio.com/files/files/nikugotanejojezaxo.pdfIn PDF document text
    • http://villa-margherita.biz/userfiles/files/12138042273.pdfIn PDF document text
    • https://incense888.com/uploads/files/202109101054162027.pdfIn PDF document text
    • http://espicycooking.com/files/file///mofurezawavodip.pdfIn PDF document text
    • http://www.ekoforte.com/upload/file/ferawelupi.pdfIn PDF document text
    • http://mya1fc.com/files/ckuploads/files/4894454863.pdfIn PDF document text
    • https://0286869143.com/editor_images/files/tafisenotisitudesasez.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_off0000cd44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD44 10572 bytes
SHA-256: bbe093f319cf2e0aa58c1706697efb644e69bb58ebe0708185d0c824903c76ed
font_01_sfnt_off0000e521.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE521 19484 bytes
SHA-256: b8dff977c70ea7dd3463edaed4a47314f994b0c6da47dacc17248a089b50f5ff
font_02_sfnt_off00011796.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11796 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1