Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e33683963400ed2…

MALICIOUS

PDF

85.7 KB Created: 2021-09-02 23:13:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 4bb1e0fabf2f26637e072042fcca05b7 SHA-1: 669f119f6f7c346c7a3190b25572f0c2019d2c4b SHA-256: 6e33683963400ed2ab61e4a8c9cbe43c8d51bf4a45341a9a398a5e5d9514b8f1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of multiple external URIs and link farm heuristics strongly supports a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://catamma.ru/uplcv?utm_term=sony+srs-xb10+portable+wireless+speaker+manual PDF link annotation
    • https://studiovizia.com/webroot/img/content/files/tivajo.pdfIn PDF document text
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/3b1e80882600440ae24a41d9b51ef8a2/sukop.pdfIn PDF document text
    • https://marjoyunlar.com/calisma2/files/uploads/46965980725.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a6a83e360b8---dujejek.pdfIn PDF document text
    • http://fpole.ru/sadm_files/gekubemufowaxawepovivikig.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160972018127c3---jewanumasatilimuvubera.pdfIn PDF document text
    • https://kodcomputers.ro/2664/uploads/82162777583.pdfIn PDF document text
    • http://dgjinhak.kr/DATA/upload/files/202106170621567514.pdfIn PDF document text
    • http://3mfa.com/images/editor/files/836293677.pdfIn PDF document text
    • http://fence-alarm.com/userfiles/files/14444645720.pdfIn PDF document text
    • https://himalayanthailand.com/image/upload/File/bepikexivip.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/4166ab173ac298916a38900f26a251e7/51798565669.pdfIn PDF document text
    • https://shopabrang.com/images/files/39040560917.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160fea273992c3---tukaf.pdfIn PDF document text
    • https://astek-telem.fr/userfiles/file/vobikumavotavaji.pdfIn PDF document text
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/ee9ab46ee2173fb26e624a1ed56644ad/xelivileworili.pdfIn PDF document text
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fb0a19897f---27690593059.pdfIn PDF document text
    • http://dogable.de/userfiles/file/26693556508.pdfIn PDF document text
    • http://bebelino.ru/userfiles/file/mojovobipoxuweb.pdfIn PDF document text
    • http://highendschmiede.de/highendfiles/file/94424232327.pdfIn PDF document text
    • https://socohoteldanang.com/uploads/image/files/bixogenekatiwasixatopi.pdfIn PDF document text
    • http://0851gay.org/userfiles/202107file/2021070704152470554.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b02c1a73ce---xibuvimufebubed.pdfIn PDF document text
    • https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/6015f5941d1dc3a8537702df39d29efa/64570977934.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_off0000e80b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE80B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10022 11328 bytes
SHA-256: 46245b2ef0d78631d7aae22edaf80d2d46c7f3dea967e938bf520c1aaa21ac4a
font_02_sfnt_off00011ab5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AB5 17792 bytes
SHA-256: 5b91e0ed50c344e72b522517455f0626ef384a3fabf5616147d33e67f4fbe29b

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