Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff19d6e82a2f040f…

MALICIOUS

PDF

76.3 KB Created: 2021-09-11 19:28:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: d2219ada67f3c0e61a78e1c71311edfc SHA-1: 7d3fce7f72f46789b39966fe9ab51ad644be3e12 SHA-256: ff19d6e82a2f040f0923a6c16e1db795669cdbadd8d65557239e301c45211801
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Numerous embedded URLs and a heuristic indicating a link farm on disposable hosting suggest the primary goal is to redirect users to malicious sites. The presence of external URIs and embedded URLs points towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://pistant.ru/uplcv?utm_term=nfs+heat+android+gameplay PDF link annotation
    • http://doingthing.com/downloads/blog/geust/files/20408581847.pdfIn PDF document text
    • http://suvagcentr.ru/userfiles/files/3101044279.pdfIn PDF document text
    • https://coffotea.com/uploads/files/202109080850534933.pdfIn PDF document text
    • http://inggeo.eu/userfiles/files/memakavokirevi.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/0dta9v9l4qucute5ma9is9urg4/50769562275.pdfIn PDF document text
    • http://www.travelwithtaangoo.com/img/file/legovonixadipajikud.pdfIn PDF document text
    • https://prosaison.fr/userfiles/files/69608619981.pdfIn PDF document text
    • http://ozdermusavirlik.net/userfiles/file/ladedusavizobazo.pdfIn PDF document text
    • http://svatba-emi.com/uploads/pages/files/tizonumipepad.pdfIn PDF document text
    • https://anitt.in/ckfinder/userfiles/files/72890303986.pdfIn PDF document text
    • http://cosmik-kinoteatr.ru/sadm_files/xugoserar.pdfIn PDF document text
    • http://autoset66.ru/admin/ckfinder/userfiles/files/28341223729.pdfIn PDF document text
    • http://hoangduy.vn/vn/files/teditidimereke.pdfIn PDF document text
    • http://stuarteisbrucklaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/538161916.pdfIn PDF document text
    • http://t-groupvnxkld.com/uploads/news_file/wudejazelonilosotu.pdfIn PDF document text
    • https://mgs-on-track.com/uploads/misc/files/lusiroxidedikiveroz.pdfIn PDF document text
    • https://sluganarodu.org/userfiles/files/45786147198.pdfIn PDF document text
    • http://balie.overeembv-profielen.nl/upload/files/3876697074.pdfIn PDF document text
    • https://tunhuaduytan.com/upload/userfiles/files/71746640608.pdfIn PDF document text
    • https://papiratisk.cz/soubory/48314257951.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1612f3fe7d27eb---xipanusorox.pdfIn PDF document text
    • http://cgmorenanews.com.br/ckfinder/userfiles/files/balurokanotoparawemopidob.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_off0000c55b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC55B 17384 bytes
SHA-256: 7df9b1bd1820319ebc78f1f3bf1313a0d7ed2abbd2cb8badcfd22bf15a36c5d2
font_01_sfnt_off0000f2aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2AA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010ac1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AC1 11036 bytes
SHA-256: c7394cf04f831a99645bc3f52029215324ca3d97c52e81928981a999dc36653c

Open this report in the interactive analyzer, or submit your own file for analysis.