Malicious PDF — malware analysis report

Static analysis result for SHA-256 47cd7c48b4213758…

MALICIOUS

PDF

72.4 KB Created: 2021-06-26 03:34:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c943465fb89f875acfffd60968938299 SHA-1: 695896f5bf6eaec9ffcfb2905babf129add02833 SHA-256: 47cd7c48b4213758ed4a5a915d2c137b515c2e863b99cff7010a7f33c25a818d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and embedded URLs point towards a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/3b6c1e7a89893d2efc548897706dd8ae/96569695118.pdf
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/cc58f62a30bbae474e3c0df284a67ac4/nijaguli.pdf
    • https://zoomkish.com/basefile/zoomkishcom/files/fofiserokiterukatote.pdf
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/160c9455e7f629---tununinizagafawato.pdf
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609caf747cba4---gabanupeposerukopirano.pdf
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/eb8285ba48e1aca15048ce1c0bbf4cea/9789032038.pdf
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/97ed5477941a5853ce87f84f0a2442ea/megekejuwave.pdf
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/7436aff62ace7f3b4d805ef62d01f10d/43454917082.pdf
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b9f63bf2c9a---95974121503.pdf
    • https://hfdjet.com/wp-content/plugins/super-forms/uploads/php/files/7bc97a528cd3910f35c0950236fca96e/69427098763.pdf
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16076771274cd5---puwunetazi.pdf
    • http://adamlegal.com/userfiles/file/4144268390.pdf
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607502712c646---68881013892.pdf
    • http://ecompletecontact.com/ckfinder/userfiles/files/fajegasepixadipiduxufuzem.pdf
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b8add683e4---gunolokeruba.pdf
    • https://contactfm.be/userfiles/files/godojubuniw.pdf
    • https://arket.io/wp-content/plugins/super-forms/uploads/php/files/1np4g74sslje8lt3aqdr34i7ej/sazosuros.pdf
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/73370ce74eb3415f426440b9b5a43b61/devexomezi.pdf
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adecde41719---jelenijafupedixuzur.pdf
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c9c7bbfbc0---niwafenovobitededere.pdf
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/kijo91hvd0lvdlf948rh4ndsq1/89798543600.pdf
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/v1oq9uq8p233ftbk4if3s88567/rajogemijafavumuw.pdf
    • https://nmg.lv/img/uploads/files/15707326535.pdf
    • https://birudongker.com/contents//files/38119952882.pdf
    • https://medprobr.com.br/wp-content/plugins/super-forms/uploads/php/files/af270eb7b9d2312e6bacb9ccca07aa08/64221539282.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=keeping+up+with+the+kardashians+watchseries
    • 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_off0000bac9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xBAC9 16792 bytes
font_01_sfnt_off0000d2e0.bin
d82014418ac8e71daad961d51d1028b48ccb79012615eda01c2781e4f16aebce
pdf-font-stream PDF embedded font (sfnt) at offset 0xD2E0 10896 bytes
font_02_sfnt_off0000ebf4.bin
b9be62b3823c47e0e6e737a876954813699da9c71e9be8321ebb177fb4a4913b
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF4 15688 bytes