Malicious PDF — malware analysis report

Static analysis result for SHA-256 0753ef3bdd3cc31d…

MALICIOUS

PDF

77.5 KB Created: 2021-09-02 22:08:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 7a8776924d76562c2165993d891ceacf SHA-1: 244c6886b0948a5df0de694e45e6c607620f9f3a SHA-256: 0753ef3bdd3cc31d94ac6ec2a916a20e31a65014402aa3d657d73d286369f73d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document functions as a link farm, containing numerous embedded URLs that point to compromised CMS uploads and disposable hosting sites. These links are likely intended to lead users to phishing pages or download further malicious content.

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 https://irlanc.ru/uplcv?utm_term=define+teaching+strategies+pdf PDF link annotation
    • http://sunriverps.com/data/editor/file/kizojinopotixetizorufiwu.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac962b6e8d4---40926835174.pdfIn PDF document text
    • http://deurenhanger.nl/userfiles/file/revotidu.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/16079df824703e---zuxevoligivexuparijidi.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b05b63d306f---redorasovita.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/06147e9abed9e6400a6e05743fd5b5c7/31927060769.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/1607a545c02dfd---farozovisafig.pdfIn PDF document text
    • http://pogotowienaukowe.com/Upload/file/75967305082.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ea502c37b2---34824852010.pdfIn PDF document text
    • https://sport-jicin.cz/dokumenty/butelaworajuvonifomekofo.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/0vrqqe1ldhbgh7peo8107ekq9v/newagogowodipof.pdfIn PDF document text
    • http://tsuiteru66.com/userfiles/file/gepujusez.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/bbe1fdb4bf2fd00c57527975b76eef4a/70021386625.pdfIn PDF document text
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/ae63925789434493c73983ccf38b7411/rolatodipozo.pdfIn PDF document text
    • http://hoskinspugs.net/clients/40498/File/24760300752.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160751ad759639---16717453987.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/1a5ee5cea4312aec8d242dbfa0c7e60a/kuzenufexonozeturi.pdfIn PDF document text
    • https://presstone.hu/userfiles/file/ravabokinikubolovub.pdfIn PDF document text
    • http://brukbet.com/user_images/file/62184709646.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/16125490380e17---gedowi.pdfIn PDF document text
    • http://eventechsite.com/files/files/72876305768.pdfIn PDF document text
    • https://twr1115.net/files/fckeditor/file/zamovutasedupatazope.pdfIn PDF document text
    • https://nullemont.fr/nullemont/ckfinder/userfiles/files/konileberipomofegexisu.pdfIn PDF document text
    • http://aps-mes.com/files/file/resarapewuloguvezazex.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/lofokugakijoterosotuda.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_off0000ccc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCC6 16668 bytes
SHA-256: 76289d05d29f80c16d0b1a8a01b51d600a966ec7f3d2eca9246c7d19449498ef
font_01_sfnt_off0000f75e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF75E 10736 bytes
SHA-256: 3e81a312b1336960027b024b7c673b69273adacef03a91f1f3eb4488989bf410
font_02_sfnt_off00010fd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FD0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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