Malicious PDF — malware analysis report

Static analysis result for SHA-256 64e258383323065e…

MALICIOUS

PDF

90.7 KB Created: 2021-09-05 11:07:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 3a016efc0f188050a059bc253045126f SHA-1: 0789aa23b2144d2f5344a50a8e787143b11fba4e SHA-256: 64e258383323065e01f408780750ffa6b67b46ea3a28389356150ab6768b56d6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, directing users to download further malicious content disguised as free resources. The embedded URLs point to compromised websites, suggesting an attempt to leverage existing infrastructure for malicious distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9798d5de87---89188130122.pdf In PDF document text
    • http://artecgroupservices.com/imagenes/file/81150889229.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160916750813a7---27001020666.pdfIn PDF document text
    • http://findmealocalpainter.com/insurazon/admin/userfiles/file/39101914661.pdfIn PDF document text
    • http://vhktn.at/images/content/files/sikibejemagefiji.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d63abcc6ce---tezefogus.pdfIn PDF document text
    • http://aid-calais.com/userfiles/file/vevatepifa.pdfIn PDF document text
    • http://chretkinia.pl/userfiles/file/45317294991.pdfIn PDF document text
    • http://matstravel.ru/userfiles/file/sovejipikizowipijatunawu.pdfIn PDF document text
    • http://ducthanggroup.com/webroot/img/files/pavasipaxekerazekel.pdfIn PDF document text
    • http://cuakeobinhduong.com/upload/files/86356581583.pdfIn PDF document text
    • https://cvconstructionsgoa.com/pharma/admin/userfiles/file/bewunifizetanem.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/1i19imd4cv4osr4kso5jn14ohv/23568554962.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16126499096256---zobibofewozitujajupodoto.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1608a831e29e2a---liwujemi.pdfIn PDF document text
    • https://www.stnedu.com/ckfinder/upload/files/6248363230.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/s803voes6bm4314bm53ptstcgj/21360450556.pdfIn PDF document text
    • http://kaizenlife.com/ckfinder/userfiles/files/96329297061.pdfIn PDF document text
    • http://duszek-lasu.pl/userfiles/file/35258443208.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/a2590f877e1e362fe33581a3ab9ca5c5/nadufusupivonogutenikuxol.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e1bb532d2eb---49251718374.pdfIn PDF document text
    • http://tuttotop.com/userfiles/files/11262589972.pdfIn PDF document text
    • http://slesnick.net/userfiles/files/konawerunuvopovevijuzix.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607eca5c0d6af---44390188617.pdfIn PDF document text
    • http://cmuniontravel.com/userfiles/files/83303132230.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=english+grammar+pdf+free+download+in+urduPDF link annotation
    • 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_off0000f7cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7CD 20324 bytes
SHA-256: c7b50f6121c00a2d0bebf9abb8f858165ae2961dd6ae97491a2c211c94532c9b
font_01_sfnt_off00012b57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B57 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001436e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1436E 11016 bytes
SHA-256: 870fd5c6498e6379e1883ef0a564e2b0cdde48acec0feb75498bbf3c3a129c6f

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