Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1ae164feef7f88e…

MALICIOUS

PDF

80.1 KB Created: 2021-09-01 13:10:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 4d12e4b8c67563dc1aca8d5d24dd01ff SHA-1: ebf8021734835044f71bae434171a47eeb62529a SHA-256: a1ae164feef7f88ea3ed564663fc0b78c2e2094b45c93574cc06d71f19479728
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous embedded URLs that point to compromised WordPress upload directories and other disposable hosting. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4b208a1e9---lijopawajixegenasumab.pdf In PDF document text
    • http://chieucoingason.vn/files/torodetulale.pdfIn PDF document text
    • http://apexibd.com/uploads/fck_uploads/file/ferodiwedagalubitob.pdfIn PDF document text
    • https://thuanxuongmonmb.com/admin/webroot/upload/image/files/xagitujodofikorukipusan.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/1683d255d167f9561cde0a55237ad91d/lomafavuwixezikuxikoz.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/uav5f63bh4e9ap6vuqfvf34llc/fojubopivisuworabomuxeres.pdfIn PDF document text
    • http://smartarts.bg/userfiles/file/51633148219.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/b9a09e7d57f51c6fa8df8d6b563b5c22/37125469511.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16086390da16f9---pafesopenasu.pdfIn PDF document text
    • https://rowadalbyt.com/userfiles/files/pivudojimu.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/ec21b3u4liu5tkmsjdf5mfeqc9/tutozimuvagexepab.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/1932d68792406bb03bf2cd6e1f168a54/45061550657.pdfIn PDF document text
    • http://ccsup.co.th/uploads/ckfinder/files/64984755181.pdfIn PDF document text
    • https://amursvoidom.ru/media/files/62760663169.pdfIn PDF document text
    • https://clifestyle.net/uploades/userfiles/file/kixevafitedibopunomikimo.pdfIn PDF document text
    • https://alkalacarservice.com/public_html/userfiles/file/81145939004.pdfIn PDF document text
    • https://dagvandearchitectuur.be/_files/file/notasosevaperedatanubu.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e677a8464f9---jerusowesefikani.pdfIn PDF document text
    • http://zoncmswebsitebeheer.nl/files/editor/file/pumigufezafogigibiwa.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/abdbbed6dma3jd7oj6t21iktkv/71897736197.pdfIn PDF document text
    • http://roughriders66.com/clients/f/fa/fa96273273f04fd2a06feef12b1e4d70/File/fisusetakigax.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed342bee0d---9273296480.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=102+ps+to+hpPDF 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_off0000d6d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6D7 9912 bytes
SHA-256: 9dfb48a4936dfd0fba2da74fb5688c453cad8ff1ed836342d2715b8e00a430f0
font_01_sfnt_off0000ecdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECDF 17936 bytes
SHA-256: 07a27218d3ddaaac27c6969c9588b78b084c543b50e5258dec4a4c6ff514ca62
font_02_sfnt_off00011b76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B76 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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