Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1967d69e9091248…

MALICIOUS

PDF

77.4 KB Created: 2021-09-04 13:29:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 809db50278d649ccb9eaaa36397b391b SHA-1: e4e5e124cd030da8f74c7e32fe83fd048cc87810 SHA-256: d1967d69e90912489ca20f28c77f1dc6a9f399076d2ce3fa8d53919daaf11555
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to numerous disposable domains and compromised CMS upload locations, suggesting a phishing or malware distribution scheme. The PDF's structure and embedded URLs are consistent with attempts to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://nomylo.ru/uplcv?utm_term=yyz+bass+tab+pdf PDF link annotation
    • http://hornets88.com/clients/56662/File/wapowanuju.pdfIn PDF document text
    • http://cjandjunemillerfarm.com/clients/75830/File/38687549499.pdfIn PDF document text
    • http://yjsyrj.com/userfiles/file/87938132834.pdfIn PDF document text
    • https://heatingboiler.ca/fck_upload/file/9262343783.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c95d03d2d9---tetexatafenelalikemalewum.pdfIn PDF document text
    • http://urbancollab.com/userfiles/Proj_Name//files/jazonum.pdfIn PDF document text
    • http://thietbiotovn.com/Images_upload/files/86885732490.pdfIn PDF document text
    • https://vinniescustoms.com/userfiles/files/vorunole.pdfIn PDF document text
    • http://cuacuontoanthang.com/media/file/28586069583.pdfIn PDF document text
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/6a4b419e6e200c3bcc00f9c044f8e499/gepim.pdfIn PDF document text
    • http://dekogard.net/deko/veri/_files/22852802688.pdfIn PDF document text
    • http://uptindia.com/newsimages/file///buvawanilevopijadax.pdfIn PDF document text
    • https://pastelbuilders.com/userfiles/file/lepolerok.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/cutma82soq56v2nl68s5qq28r3/57227006551.pdfIn PDF document text
    • https://samowar.ch/upload/file/jirew.pdfIn PDF document text
    • https://mancomunidadvaldizarbe.com/userfiles/files/47190507367.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/160876500cc6e1---lenamamepisidi.pdfIn PDF document text
    • http://carsongrad75.com/clients/3/35/35717660c32d3dd9b0ffde8f33a19d23/File/kobitukemotunorovotuzi.pdfIn PDF document text
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/52bc02df5c42bb02fcc137a021c3b5c3/71351984074.pdfIn PDF document text
    • http://gvs-russia.ru/admin/ckfinder/userfiles/files/29311947777.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8a753b501d---wifeniwipetevevude.pdfIn PDF document text
    • https://businessservicesuk.com/userfiles/file/fazufik.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607b34d75513b---jawosenizikewavifeviv.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_off0000cc63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC63 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e47a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE47A 10196 bytes
SHA-256: 3d977171eb45469675064a28c714e055ae99acb69af08e4455edc610ad026f49
font_02_sfnt_off0000fb4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB4A 17300 bytes
SHA-256: fd490bd7f2f372deaeaa2bb5be61a3568cbd80de7044c16c234c22d67051227c

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