Malicious PDF — malware analysis report

Static analysis result for SHA-256 7279620d1a07270c…

MALICIOUS

PDF

71.7 KB Created: 2021-09-26 05:36:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 315aea6e05042e63d83db843699d0b63 SHA-1: 8f5fc437199305976866314719d8047e61b2e3b3 SHA-256: 7279620d1a07270c00c9b67616cffaeb8941856ccd802a419871bad8f0b4d22b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable domains or compromised CMS upload storage, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious redirection tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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=principles+by+ray+dalio+pdf+download PDF link annotation
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/gusokutepelo.pdfIn PDF document text
    • http://jfhcoaching.nl/userfiles/files/57059851781.pdfIn PDF document text
    • https://aonetreks.com/uploads/file/leleborirajatuka.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6133c4ebf5a507fbd9cd7ad2c25fd640/56540416269.pdfIn PDF document text
    • http://hftyby.com/upload_fck/file/2021-9-4/20210904021152293819.pdfIn PDF document text
    • http://onelove.cz/file/xoxukidagotalapirodetumi.pdfIn PDF document text
    • https://lrsinc.co/userfiles/file/74079519137.pdfIn PDF document text
    • http://ahlhy.com/uploads/file/230828188227.pdfIn PDF document text
    • http://villapellegrino.it/userfiles/files/73916846316.pdfIn PDF document text
    • https://grandiosieventinuziali.it/filesUploads/file/59963909144.pdfIn PDF document text
    • http://onestep-tokyo.com/userfiles/file/94504882143.pdfIn PDF document text
    • https://playindiano1.in/ckfinder/userfiles/files/vaseguzefavusuxofijotov.pdfIn PDF document text
    • http://icsbc.ru/fuploader/file/10233631716.pdfIn PDF document text
    • https://kochitaxirental.com/ckfinder/userfiles/files/sirudomokevabafikixiji.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/eb01aa54b8d973ce2495f463d33ea4e5/32539191652.pdfIn PDF document text
    • https://cqc-material.com/app/webroot/userfiles/files/sunagapibozelubar.pdfIn PDF document text
    • http://bradzo-ep.com/uploads/files/14274637455.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/7d75ed3d4fcc0c50c799b865ec6cf8b0/xifim.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/57ugq3s1p48g0kepk5cpl1h4ua/zewixevudagimoditetab.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612fc39a925e8---30980868261.pdfIn PDF document text
    • https://markiza-trade.ru/admin/ckfinder/userfiles/files/lafagozux.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f974201ff7---90252540259.pdfIn PDF document text
    • https://abbma.in/admin/uploads/file/63155062496.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_off0000b440.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB440 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cc52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC52 16936 bytes
SHA-256: 63a5e94628f379c4bb3e6c2909bbf446f55dca8e2d5bcbcfa58c2a1a5fc70283
font_02_sfnt_off0000f7c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C4 10856 bytes
SHA-256: a8619a2a45652318d5989ccd6e45634e6a39b817309d29badb3148dba0d6595e

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