Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e095a1962ad2404…

MALICIOUS

PDF

82.4 KB Created: 2021-08-17 05:44:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: dd2b104a168ebd4e95e5efe61240a698 SHA-1: d4ce442dcfea4c89bd6d2a1a3a118f613b89f95e SHA-256: 2e095a1962ad2404d57a1c9a79e770ec53cb489010a8b47b5d90422f51d5bc41
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to compromised CMS upload directories or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly support its malicious nature, likely leveraging exploitation for client execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://agcslohian.com/userfiles/file/siwozo.pdf In PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/9ca477bc79e6832e47ac6831e01fb556/82884013846.pdfIn PDF document text
    • https://beautyyaurient.com/editor_upload/file/72695931874.pdfIn PDF document text
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/kstv5enuge445cmujhm1i88jf0/tunokepuzizamavod.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/76440183180.pdfIn PDF document text
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/ce1e4caa85e49f84ee4828b957ef0c1c/16272517782.pdfIn PDF document text
    • http://manpukuorder.com/uploads/files/sekixofolususag.pdfIn PDF document text
    • https://elbag.net/wp-content/plugins/super-forms/uploads/php/files/c6d241f0f10cb16cbee54e2fa9d00d46/sifamasegamulovupu.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c63670d968---rasavujajugilojigogitita.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160830d9445137---xoregivifakopiku.pdfIn PDF document text
    • https://puppometalli.eu/file/zolamadotesaj.pdfIn PDF document text
    • http://sanarina.de/ckfinder/userfiles/files/81224588905.pdfIn PDF document text
    • http://kedehg.com/ckfinder/userfiles/files/87312024810.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160862b2e04a20---kelilisibeveridebugafek.pdfIn PDF document text
    • http://citygclub.com/ckupload/files/sewajomuzupawejibel.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/3ce5e24e6d039b0cc3b3c531aef31176/kibivepaxazas.pdfIn PDF document text
    • http://csc010.com/userfiles/file/20210720000815_4uygi2.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/p4jedvgi9n33ht8u4r7qf1gcd1/jedarewobenenimigopaba.pdfIn PDF document text
    • https://jotekonybakterium.hu/userfiles/files/xapikoledizufexabare.pdfIn PDF document text
    • https://bnbcostaverde.it/userfiles/file/vaximezuvigogerugezeram.pdfIn PDF document text
    • https://anthonygillant.com/userfiles/file/fupezexomidutedug.pdfIn PDF document text
    • https://snqrsl.quebec/upload/editor/file/xidusoko.pdfIn PDF document text
    • http://bodymindspiritconnection.org/clients/5/53/53f1eac0d8ee32431a47b4e1af774f29/File/bagajumorajano.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=1998+polaris+scrambler+500+repair+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_off0000dca1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA1 16732 bytes
SHA-256: ef3c5bb1308d2df27b9030bacfe2081723d1a25b7a4f41d08b5226a7f2d5ee3d
font_01_sfnt_off00010870.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10870 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012087.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12087 11264 bytes
SHA-256: 5e6e4e648a2e324a46344d420b11441af714b41355e51933d10c9b149ae20f13