Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a6aa5b92321e7f7…

MALICIOUS

PDF

80.5 KB Created: 2021-09-08 01:21:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 69d3402b27d34fca7a5703ad01fea1a9 SHA-1: ec4abf77769c377f203ec7d2412eb9d5b20e788a SHA-256: 9a6aa5b92321e7f7606d99660da3f4332a0e63f75e46b4d9e8c6340c2ad41b8b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting it functions as a link farm. The primary purpose appears to be directing users to potentially malicious external sites, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://accesoriosalmayor.com/images/userfiles/file/sobobevazadiwogomagonisik.pdf In PDF document text
    • https://detmers-kontejner.hr/files/19740630514.pdfIn PDF document text
    • https://dm288.rs/slicice/file/89264787141.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f20b1515ca8---66055087595.pdfIn PDF document text
    • https://sonerofset.com/userfiles/file/joregipazatexejax.pdfIn PDF document text
    • http://pantipplaza.com/userfiles/file/33374307335.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b92ed72a7b5---52806246226.pdfIn PDF document text
    • https://menu2uplus.com/images/file/484317434.pdfIn PDF document text
    • http://global-leasing-management.com/uf/file/21635204853.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/46mv7u0enjeml1hjna521a8ad4/vaker.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c1bd4315442---48504921166.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/fijodososugum.pdfIn PDF document text
    • http://aire-limpio.com/img/editor/file/lipuzuvene.pdfIn PDF document text
    • http://controlsystemco.com/cache/fck_files/file/12683833350.pdfIn PDF document text
    • https://drlanda.hu/user/file/rejigubi.pdfIn PDF document text
    • http://think6.net/ckfinder/userfiles/files/20210806104324.pdfIn PDF document text
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/pct2qerfc7mjqn0fghugngur17/86052376191.pdfIn PDF document text
    • https://ienter.bg/files/tebox.pdfIn PDF document text
    • http://rafaelokazakov.com/file/60517527863.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160bf5c1d89511---61215445790.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a032a934de3---xirozemupujusolil.pdfIn PDF document text
    • https://wfca-czech.cz/temp/userfiles/files/36432501024.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abb27ed08af---27499972996.pdfIn PDF document text
    • https://ohcsi.com/ckfinder/userfiles/files/39667465523.pdfIn PDF document text
    • http://mebco.ru/images/file/86799866183.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=honda+excell+xr2625+engine+manualPDF 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_off0000cac2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAC2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e2d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D9 11060 bytes
SHA-256: 721b3bc33de287e7a171aa82f24e8813ec4dca18c651439a69d4085413f047d5
font_02_sfnt_off0000fc69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC69 21088 bytes
SHA-256: ccdbb77e3dee6ba1c60ca409728e040f1b26ec2321126826d549d6259c76b8c0

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