Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c035130529d6ecc…

MALICIOUS

PDF

104.5 KB Created: 2021-07-22 16:22:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: bdbc97effde995afbd3210a7a2fe5528 SHA-1: a22f760769d168fe2b3570b042ec557f5012ef42 SHA-256: 7c035130529d6eccc65cb00e3af739e8824cfdf631c5b18f2439dcc824f3f361
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed for SEO manipulation or user redirection. While no scripts were explicitly extracted, the PDF structure and link farm characteristics are consistent with phishing or malware distribution lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9910

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://tomorrowhubs.com/upload/users/files/dodeligubujaboperozekug.pdf In PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/8858ad324b54a4dd94eb0c649f6e7306/19344635497.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/031758099931.pdfIn PDF document text
    • http://circuitvietnamcambodge.com/hinhanh/file/wuzizekafisosifozaba.pdfIn PDF document text
    • http://thevelascofamily.com/clients/11614/File/49355118742.pdfIn PDF document text
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc89edd599---pitalexosokubipol.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/5241a3839cebc565518a35af33b3c61b/muvubesobe.pdfIn PDF document text
    • https://leganordavigliana.it/uploads/file/86318321213.pdfIn PDF document text
    • http://epoxidice.ro/mm/file/gemarevejaxivejufejujud.pdfIn PDF document text
    • http://robertfeinberglaw.com/images/edit_images/file/nonajelosebiwumaforado.pdfIn PDF document text
    • http://tivatijapan.com/uploads/userfiles/file/lepob.pdfIn PDF document text
    • http://poultech.net/d/files/2279542835.pdfIn PDF document text
    • http://leaguengn.com/userfiles/file///bolagujaja.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072f933785bb---garalesik.pdfIn PDF document text
    • https://digicpictures.com/downloads/lavaf.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d66c85b6a9d---316982217.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160d39d8f5951e---2071535924.pdfIn PDF document text
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/e24gl2vtfsvau2p1ad1cldjtbe/letodolilekaxapepuvos.pdfIn PDF document text
    • https://0800-707-808.com/upload/ckfinder_temp/files/20210719183818.pdfIn PDF document text
    • http://www.victoriousintl.com/new/resource/files/mezuvebiban.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/bdo0trf1fgp2f24mqsms9qv0p7/sixovaxem.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/toginobowaba.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3faa797cab---dogizuwenipefudebakomosa.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/i97tqbgpig81gcasu54pimt4p6/67031494219.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=demarche+meaning+in+englishPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off00011228.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11228 18420 bytes
SHA-256: 98fad700b2b2dfa36fb96b5a1d0b3eef4ce4e40df59b8873494a09d448fb1b8f
font_00_sfnt_off0000fab0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB0 10460 bytes
SHA-256: cbe18924850640316a4f162be62e520447d57017f28579e0fc7253a060cc43e4
font_02_sfnt_off0001301e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1301E 3464 bytes
SHA-256: a8161c2f5ba9235eb51b4fcc43b6bb219725019365cb8d38f9ec25dfe5ce54ff
font_03_sfnt_off00013d99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D99 24512 bytes
SHA-256: 3c380c171dfc18b7955e43dd3e0994bd5b32dd979e1e099c971f1e2ad4b1ffb5
font_04_sfnt_off0001788d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1788D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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