Malicious PDF — malware analysis report

Static analysis result for SHA-256 3382672a2f358086…

MALICIOUS

PDF

83.2 KB Created: 2021-09-11 11:04:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 0d283ba7524352fd0b32b6adc0b67be3 SHA-1: 2d471091bcbb5fa77b116a0f049044e8952d0c58 SHA-256: 3382672a2f358086c9393242f2c97a0d8db57654d060165a25239b5c8df0f127
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous embedded URLs pointing to disposable domains, suggesting a link farm designed to redirect users. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a tactic to obscure the ultimate destination. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://inwebjor.ru/uplcv?utm_term=mym+fans+crack+apk PDF link annotation
    • http://clinical-pain.com/pds/userfiles/files/81631565596.pdfIn PDF document text
    • http://heatexchangersolution.com/upload_fck/file/2021-9-8/20210908032244324119.pdfIn PDF document text
    • http://rtm-plus.com/ckfinder/userfiles/files/majugoxobusixanow.pdfIn PDF document text
    • http://myshopgroup.com/userfiles/files/55524446.pdfIn PDF document text
    • http://ncfc.com.tr/ckfinder/userfiles/files/62417358624.pdfIn PDF document text
    • http://yotlist.com/uniformkontakt/userfiles/image/files/junubenotodumugudamifano.pdfIn PDF document text
    • http://viorina-deko.com/images/file/potunonurokopewajisa.pdfIn PDF document text
    • http://fantalife.nl/userfiles/file/95593401924.pdfIn PDF document text
    • http://abwlargo.com/uploads/files/zebelozopunegiluramo.pdfIn PDF document text
    • https://happycolaborativo.com/uploads/files/pivobijetutakiv.pdfIn PDF document text
    • http://hitelesen.com/userfiles/file/dalasofadufetexemevapuso.pdfIn PDF document text
    • https://comtraining.cl/userfiles/files/kotida.pdfIn PDF document text
    • https://smartcrm.cloud/upload/files/xenuwuzomolekosed.pdfIn PDF document text
    • https://speedwayinfo.hu/uploads/file/12581855575.pdfIn PDF document text
    • http://vimbark.sk/editor_uploads/files/gorixedixopoxosijobinuz.pdfIn PDF document text
    • https://manorhair.com/uploads/files/202109110244537441.pdfIn PDF document text
    • http://matkinhantai.com/luutru/files/93124040344.pdfIn PDF document text
    • http://caopump.com/admin/userfiles/file/bizamaxinuxajovibunifegu.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613524b1971e5---nefokiret.pdfIn PDF document text
    • http://aquatherm-graz.at/files/zozazoxuvesiwotasaluwetix.pdfIn PDF document text
    • http://sfalojistik.com/userfiles/file/80786191825.pdfIn PDF document text
    • http://budaors.varosom.hu/userfiles/files/36093530844.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/161339940f2442---98898194807.pdfIn PDF document text
    • http://tropo-design.com/ckfinder/userfiles/files/nemizojadoxigopozixub.pdfIn PDF document text
    • https://cortemadera.com/wysiwygfiles/file/39894865738.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_off0000d98f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD98F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f1a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A1 21000 bytes
SHA-256: 452a902024f4d3a4755d3655abc6a5804049e5dd0821777fd8af6090a7e2190c
font_02_sfnt_off00012859.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12859 10352 bytes
SHA-256: 9949c2ca089bf96bcc020d2d7cf81e03f5fefed66d175a653aa01a92eb5216d1

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