Malicious PDF — malware analysis report

Static analysis result for SHA-256 75f2ec4a9b16f9ef…

MALICIOUS

PDF

82.2 KB Created: 2021-09-03 01:17:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: d820445d69b0dd5975540a33e76d0537 SHA-1: fe4b728b6f7341a9f21c20e0a8aed48dd1a7c4e6 SHA-256: 75f2ec4a9b16f9ef9a6664cd860c3b3188d537ca1628af8f6e522b684d7829ba
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a link farm with numerous URLs, many hosted on compromised CMS uploads or disposable domains, suggesting a phishing or malware distribution scheme. The presence of external URIs and link farms points towards an attempt to redirect users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://queure.ru/uplcv?utm_term=cafeteria+design+requirements+pdf PDF link annotation
    • http://hk-sai.com/ckfinder/userfiles/files/92278868942.pdfIn PDF document text
    • http://ikkosushi.com/uploads/files/84464675111.pdfIn PDF document text
    • http://solamsys.com/userData/board/file/wenufakomavezekireza.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160771925da7fc---67376111604.pdfIn PDF document text
    • https://lensprovn.com/ckfinder/userfiles/files/jezuwokebivuwakamivogup.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbf05bd694.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/kmuv9uk73fuv1hubm4ous4q5ku/wisejawatedug.pdfIn PDF document text
    • http://palami.by/images/file/xibafalazipevesugepuzas.pdfIn PDF document text
    • http://khocabien.com/uploads/files/marovelivi.pdfIn PDF document text
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/a618cc30ffa4ddbd3e0fed39029a19cb/39756889302.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160831e2797270---jagor.pdfIn PDF document text
    • http://dambi.pl/userfiles/file/98605459544.pdfIn PDF document text
    • https://www.gurgy.net/ckfinder/userfiles/files/57241455243.pdfIn PDF document text
    • http://anctools.com/ckfinder/userfiles/files/lidepilibufuxikevini.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a5180f2dd85---tanovovabipafekalevat.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b79e6e3687d---saxezukuveximifiwi.pdfIn PDF document text
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/9396e849259aff0a6d6bbe7a99af1451/11646656596.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bb329f92e74---zelavet.pdfIn PDF document text
    • https://interface-graphique.com/upload/editor/file/nagatuv.pdfIn PDF document text
    • http://aybar-gallery.com/userfiles/files/94533863214.pdfIn PDF document text
    • http://guides2alpes.fr/uploads/file/18066628844.pdfIn PDF document text
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/df9283121451c91c216a270bc1295bd4/61738979653.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/jotelekakafi.pdfIn PDF document text
    • http://sosonomo.com/ckfinder/userfiles/files/vuzonodagikimuzinibebat.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_off0000dbc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC7 10952 bytes
SHA-256: d71ed40637f3b251c59f6d99f430962f77063b299233977a095718fd3d773172
font_01_sfnt_off0000f49b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF49B 18288 bytes
SHA-256: 894fc81b00957fb63b421e782c423d4f84312cc8d91ac8ee4451c6ee22dd1d47
font_02_sfnt_off00012357.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12357 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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