Malicious PDF — malware analysis report

Static analysis result for SHA-256 52eac3815e7ba24e…

MALICIOUS

PDF

90.2 KB Created: 2021-09-09 10:18:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 213d82382a0a67e05337c9bd86c8bb2f SHA-1: 0ee912a2907860edc9c8f3de31e2646690fb76e5 SHA-256: 52eac3815e7ba24e397d51c92bd023060f6a98b7d7c470f6c7c7b76e5dff2b75
196 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The 'SE_REMOTE_SUPPORT_LURE' heuristic indicates the document likely instructs the user to install or connect with a remote support tool, a common tactic for social engineering. The numerous embedded URLs, many pointing to compromised CMS uploads or disposable hosting, suggest a link farm designed to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://laborke.ru/uplcv?utm_term=mobile+android+games+free+download PDF link annotation
    • https://equator-maritime.com/userfiles/file/64922335306.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161375175e1c86---5534329979.pdfIn PDF document text
    • http://przyrodnik-kujawy.eu/userfiles/file/59376786390.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136c80198649---wazurozokajumutujomem.pdfIn PDF document text
    • https://beytarimcilik.com/admin/editor_resim/file/18119852693.pdfIn PDF document text
    • https://areopag.ru/sites/default/files/uploads/zuparirukifu.pdfIn PDF document text
    • http://ykzn8.com/upfiles/editor/files/zetovawowe.pdfIn PDF document text
    • http://vswet.ru/f/wumugibadimefos.pdfIn PDF document text
    • http://ficfart.org/userfiles/file/77196418752.pdfIn PDF document text
    • https://altonika.pro/files/fck/file/72663052717.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/9qh7dku2aq3ve5usiapjvn4gq0/70066140955.pdfIn PDF document text
    • http://neoneophytou.com/ckfinder/userfiles/files/rogujad.pdfIn PDF document text
    • http://daotaonhaccong.com/uploads/userfiles/file/rudazafogixunojonuzitowo.pdfIn PDF document text
    • http://avtokapriz42.ru/userfiles/file/giwupakajoteluberofeva.pdfIn PDF document text
    • http://asqcert.net/files/files/jixuwamuke.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/31537432035.pdfIn PDF document text
    • http://immobilieninvestors.de/userfiles/file/reteweziw.pdfIn PDF document text
    • http://greenbrier101.com/userimages/34917561545.pdfIn PDF document text
    • http://twtipa.com/upfile/files/2021/09/07/jusujixifabebugetopo.pdfIn PDF document text
    • http://cementfeet.com/userfiles/file/14783849332.pdfIn PDF document text
    • https://danielstrehlau.com/userfiles/file/bozaga.pdfIn PDF document text
    • https://k85shj16h-561lt.com/contents/files/noxibi.pdfIn PDF document text
    • http://envigest.cz/upload/file/73808271856.pdfIn PDF document text
    • http://quinta.cl/upload/files/telenix.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_off0000face.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFACE 10816 bytes
SHA-256: af93213a42ada761685136ea215a0add16d4cde053352e348bcbeea05a457a11
font_01_sfnt_off0001138a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1138A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012b9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B9C 18112 bytes
SHA-256: de0df00d1bf6d55eca406f0f9f80972044b26f48781adc78bbfeec609443bd4a

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