Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a482766d5dee285…

MALICIOUS

PDF

85.3 KB Created: 2021-09-04 06:11:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 9fa73cfb63c7a9c3d488ea45fece8954 SHA-1: b30881b034a1cf7f91f04bf740af79e7ecc82384 SHA-256: 8a482766d5dee2851de61dc5d5196255528237f8d658ebb99f71f4b69601e273
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs and links to compromised CMS upload storage, suggesting it functions as a link farm to distribute phishing or malware content. The presence of embedded URLs and the nature of the heuristics point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://garglob.ru/uplcv?utm_term=dialectic+of+enlightenment+culture+industry+pdf PDF link annotation
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee5786b08fe---50448310229.pdfIn PDF document text
    • http://razaviota.ir/basefile/razaviotair/files/xisoxavirinefufolodakofi.pdfIn PDF document text
    • http://voijin.com/userfiles/files/73784686793.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f64b438c59---84588447114.pdfIn PDF document text
    • https://vocembalo.ch/userfiles/file/4089182274.pdfIn PDF document text
    • http://esangsok.com/upfile/files/rukaputozokoj.pdfIn PDF document text
    • http://messtores.ca/fck_user_files/file/vedejatupufugu.pdfIn PDF document text
    • http://bielwod.com/userfiles/file/bokowegapiwaji.pdfIn PDF document text
    • https://foodvellythailand.com/upload/files/duzikekajojaz.pdfIn PDF document text
    • http://zzzwchem.com/upload/files/94876862507.pdfIn PDF document text
    • http://hasdeu.md/data/userfiles/files/jusozu.pdfIn PDF document text
    • http://mexvp.com/ckfinder/userfiles/files/63767278250.pdfIn PDF document text
    • https://electroagro.es/pub/files/94546395507.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160749ea628df6---dajenufukalosite.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/a47fd735524e81a056110d768203e4ed/59161323950.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/mccof2mgs00hjj5taqsotto7r8/gakanadifaluvesuvab.pdfIn PDF document text
    • http://seerupit.dk/assens/file/34304492652.pdfIn PDF document text
    • http://sxhk365.com/uploads/file///lejobeni.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e81f637924b---94132069295.pdfIn PDF document text
    • http://baaningdoi.com/file_media/file_image/file/xukugumopokizovezen.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/eoa9diev5mlflkvqgu33f06rs2/lilabetema.pdfIn PDF document text
    • http://pobierzplik.pl/uploads/files/rewuxomas.pdfIn PDF document text
    • http://thermcom.cz/userfiles/file/69592094869.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_off0000e6a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A7 17852 bytes
SHA-256: a78a3ede80e6c32eadfd8f98a5452501e55778fb6e0d0b89f67683cc55950d7f
font_01_sfnt_off0001149f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1149F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012cb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CB6 11280 bytes
SHA-256: 09ac3a24fb854829ca83e856795c847d66cf145862c5760f5634b7c151756ea3

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