Malicious PDF — malware analysis report

Static analysis result for SHA-256 bce9cb4a0e92c436…

MALICIOUS

PDF

95.2 KB Created: 2021-09-20 13:45:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 6a77861f32bfd73b65cd06a21d633b14 SHA-1: 755998e2ae48f94e9f327d4002a8f9a433a7318b SHA-256: bce9cb4a0e92c4364f362160fbb0b05586527aa00a8f1d557ce225b2678f3b1a
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites and disposable hosting, suggesting it's part of a phishing or malware distribution scheme. The PDF structure and embedded URLs are consistent with attempts to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://allytemp.ru/uplcv?utm_term=deadpool+full+free+movie PDF link annotation
    • https://promise-land.com/upload/file/gavum.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/161414aaf146db---94371118104.pdfIn PDF document text
    • http://hamlineparkplaza.com/assets/amund/ckfinder/userfiles/files/97673456806.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b9cad9824b---492521733.pdfIn PDF document text
    • http://choinka4x4.org/cms/files/file/41621268874.pdfIn PDF document text
    • http://kammed.com/userfiles/file/97016304040.pdfIn PDF document text
    • http://harekatmemuru.com/images/Media/files/60164560947.pdfIn PDF document text
    • http://vietdubai.com/userfiles/file/powolazinetoxosov.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16139d54ad81e6---12975683668.pdfIn PDF document text
    • https://bodymart.in/ckfinder/userfiles/files/wosatafakesosemexosumi.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133d3a6e4f08---54170129868.pdfIn PDF document text
    • http://easternhoteljeju.com/FileData/ckfinder/files/20210917_62A905354E6856C8.pdfIn PDF document text
    • http://epmachine.ru/d/files/gewavelaze.pdfIn PDF document text
    • http://dade666.com/userfiles/202109file/2021090414513170554.pdfIn PDF document text
    • https://chorland-dining.com/webroot/editor-uploads/files/jilenevajujobix.pdfIn PDF document text
    • http://keralastatetailorsassociation.com/userfiles/file/37131489025.pdfIn PDF document text
    • http://bigbulkbags.ahmadpackages.com/survey/userfiles/files/rejupibakugijubajeruvinil.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fa85b6cdbb---53846692172.pdfIn PDF document text
    • http://www.impactit.in/ckfinder/userfiles/files/jenuxifut.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/74d86a23eca1bba74581eb26e0466ee5/77817288451.pdfIn PDF document text
    • http://zssadkowice.pl/pliki/fizovibabuvewapi.pdfIn PDF document text
    • https://sharmtocairo.com/userfiles/files/83501657378.pdfIn PDF document text
    • http://vidol.nl/userfiles/file/vudewegezepesabaduga.pdfIn PDF document text
    • https://himalmanpower.com/ckfinder/userfiles/files/vemolam.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_off0001107e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1107E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012890.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12890 18120 bytes
SHA-256: d22b1a68667a6c9f3e5a6227a61de993a603572ef39134a8df73e63d6e3e8b71
font_02_sfnt_off00015747.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15747 10456 bytes
SHA-256: c3b194f9f2e1ac2d6a521620d2d01e668225f976aca4d6515f63cf3d74621424

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