Malicious PDF — malware analysis report

Static analysis result for SHA-256 03aa869734695ef9…

MALICIOUS

PDF

99.6 KB Created: 2021-06-29 20:07:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 0dbef3a65f4fe5f6e2027267cdc04178 SHA-1: 3d85180f190ab2c4ee9e764c132aa8cc94c5c7ad SHA-256: 03aa869734695ef97853732c4743c10fefac5fdca7761a32b3efcff050d31b9f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains numerous links pointing to compromised WordPress upload directories and other disposable hosting, suggesting a link farm designed to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

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 https://pixomot.ru/uplcv?utm_term=companies+that+use+process+costing+systems PDF link annotation
    • https://safrano.pl/userfiles/file/rugef.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/cdb451c8858c6910ad312b202536d3ff/topixamudelofogogodefunub.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/vijenulalezadokoxefatamu.pdfIn PDF document text
    • http://aucoindeshalles.com/menu/file/wojadolubitejipefafu.pdfIn PDF document text
    • http://svsteinfurth.de/radsportfiles/file/migexitofoduv.pdfIn PDF document text
    • http://viral-list-machine.com/ckfinder/userfiles/publics/files/bovegepigefupo.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/g1k5np73pcirvpnm97v06ots25/17021924660.pdfIn PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/21bg12aujhq0md653nvcrmpn1t/48240864897.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073224a24de4---deneradarevijilukag.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/21185915403.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16094495632a6c---jekomefip.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/atsoc4ohvutmu1s808h6c7kkm3/91867583533.pdfIn PDF document text
    • http://hurtmar.pl/Upload/file/84872221046.pdfIn PDF document text
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160937c98b68f4---defifako.pdfIn PDF document text
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/2d4003eafdaad5908383a7a1c6f8c966/68920401987.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/1608c38f609824---kurolisifisuzijeburabona.pdfIn PDF document text
    • http://sghscsjamarai.org/guruhargobind/userfiles/file/zozabevatag.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/16085867b3ddad---44322614771.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160bb84352748b---66432257840.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/hos9rqjmnig2ar1bc5op46eel7/78216778517.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/86ee8da5e8d8913351c28ae2e11140a8/pazave.pdfIn PDF document text
    • http://targdenunti.ro/userfiles/file/wukezev.pdfIn PDF document text
    • http://yilip.net/userData/board/file/vibamififamotogerawak.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4d5f68e29a---32932831560.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_off00012156.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12156 17560 bytes
SHA-256: ce3f9637e8107e65ac7543039515483dfcbf7f1f24c194367f1c4759276875ef
font_01_sfnt_off00014f49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F49 11020 bytes
SHA-256: e26e1b7c008eded1eb69384a24999822c907db632458c1ca7acd3e5bff74cac2
font_02_sfnt_off000168ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x168CA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1