Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ce171eac97eeef2…

MALICIOUS

PDF

74.5 KB Created: 2021-07-01 13:00:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5befa2d849eefd84c09a77782e126ab1 SHA-1: e0f663546e7932b017e7b8e32df378a3bd77fbc1 SHA-256: 1ce171eac97eeef2e34f98c4b7a9143649e301838475c0c806243f2ecf924679
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to compromised or disposable hosting domains, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://bamor.org/userfiles/file/forifonozorin.pdf
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160be1913a4a0c---nazij.pdf
    • http://acecaalcoy.com/userfiles/file/zoravubajetixigaso.pdf
    • http://bettynblue.com/upload/fck_img/20210626/file/kipenilamojem.pdf
    • https://ideylia.fr/uploads/file/setakenu.pdf
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7e9061ae47---bubulorikijufizolu.pdf
    • http://brenno-tojestto.pl/userfiles/file/81807360233.pdf
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160aabb8df03b1---8930967496.pdf
    • http://naturallabs.de/userfiles/file/radalikuxalapizej.pdf
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dad4fc14ae6---napabezonaxusuzemipofaxi.pdf
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/botunefisobagas.pdf
    • http://didaconcept.com/admin/fckeditor/file/39231160224.pdf
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16096a7aa80765---38519355782.pdf
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16072799e52146---mawir.pdf
    • https://hospvetcentral.pt/site/upload/file/57231495112.pdf
    • http://keralabiblesociety.com/fck_uploads/file/24520763786.pdf
    • http://tomaszfilipczak.pl/userfiles/file/kazubuja.pdf
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/62f561af9bf1fa0abc44e372ab01bd4e/41686456332.pdf
    • https://tungqibiotech.com/upfiles/editor/files/36853569887.pdf
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/linbou1f6chte55f7d50s1j47t/8453317255.pdf
    • http://gopherandsquirrelcontrol.com/admin/images/file/43430744884.pdf
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/bc72f0549f69cfb57bf4c2fdfc9d982a/2065472692.pdf
    • https://resonanceacteurs.nl/userfiles/file/rebudowugatelujiji.pdf
    • http://toyteepee.com/uploadfiles/file/210630031509344750mgggch.pdf
    • http://www.hgbehringer.de/img/files/files/fagujefe.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=game+of+thrones+bgm+download
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bef0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xBEF0 16792 bytes
font_01_sfnt_off0000d702.bin
10d6f502ce0f3b583ad7d53fab69cbb073e3cd4b3f54207b12ec095cb69d1128
pdf-font-stream PDF embedded font (sfnt) at offset 0xD702 17016 bytes
font_02_sfnt_off000103a3.bin
2c3bc52b230d5c52994f7c0f1fb6780861995de530e479658fe8be03ab88f8bc
pdf-font-stream PDF embedded font (sfnt) at offset 0x103A3 10976 bytes