Malicious PDF — malware analysis report

Static analysis result for SHA-256 f34de209eab5f5b7…

MALICIOUS

PDF

90.9 KB Created: 2021-09-03 03:42:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 44ea98b68b96b9872c143490f7939a37 SHA-1: 86f6bbcf44f8712666a77c451c5f180a6c8dd478 SHA-256: f34de209eab5f5b78546f0250c5b5b0f827d0271e41a0b3c57aaf305b105667c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to external resources, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a phishing or malware distribution scheme. The ClamAV detection and ML classifier further indicate malicious intent, likely related to phishing or serving a malicious payload. No scripts were extracted, but the structure suggests a lure to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd8561225e---20221257086.pdf In PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9a5d0bd934---fipowowapujejegadadikupu.pdfIn PDF document text
    • http://hondatayho.top/img-ngocbao/files/zupozazutuxetovemapib.pdfIn PDF document text
    • https://jokerprod.net/userfiles/file/saxurekov.pdfIn PDF document text
    • http://beerskiboot.com/img/upload/file/53071386916.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/bedcf2131e9e0fc02aa25a5e5c6fcf55/64706186133.pdfIn PDF document text
    • http://feast.to/upd_file/59096950526.pdfIn PDF document text
    • https://swagath.co/new/ckfinder/userfiles/files/88028260164.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a779b0938cf---viwadevefuvofiraka.pdfIn PDF document text
    • http://avandcie-energy.com/ckfinder/userfiles/files/13955225840.pdfIn PDF document text
    • http://mesamiesdallas.org/clients/e/ee/ee8f1390623de39be1ac2b47a321719d/File/89619968394.pdfIn PDF document text
    • https://botorka.ro/userfiles/file/lafiduxamulakekamodaliw.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/16108b28605e6e---46331911078.pdfIn PDF document text
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16090e48f35f4c---fovugevonurakunexanabofek.pdfIn PDF document text
    • http://mintaialuminum.com/d/files/laviwadipefefako.pdfIn PDF document text
    • http://agapetown.net/ckfinder/userfiles/files/75243291490.pdfIn PDF document text
    • http://dotacjedlaoze.pl/userfiles/file/21318827530.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/16988130666.pdfIn PDF document text
    • http://abbuffalowings.com/uploads/files/19530828710.pdfIn PDF document text
    • https://pui-vital.ro/msg_media/file/xuvukisekiruzufoson.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/3854857b0f93b4be57be465b2358c5cb/31957428384.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/0cd2fadb549aa79b2c6503add34f37ba/26764750125.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608567d1bc1c4---fuxiruwas.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c661c27b210---68607338423.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c042529e03---36612748990.pdfIn PDF document text
    • http://execdentalclinic.com/uploads/ckfinder/userfiles/files/zulogetonexuvoz.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/160abc9d94863b---xexidifapawobesig.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=shia+islamic+books+free+download+in+urdu+pdfPDF 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_off0000f830.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF830 19212 bytes
SHA-256: 7bcc99eb38e67df6780384887708374415a6b5f3adf23a6ce9bbb011e18e4730
font_01_sfnt_off00012b5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B5D 11280 bytes
SHA-256: 1342cf5197c442c144d724346a859c944d8a313b5feac29f33a1969a42ec17a1
font_02_sfnt_off00014571.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14571 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1