Malicious PDF — malware analysis report

Static analysis result for SHA-256 6eb3a45db1a6627e…

MALICIOUS

PDF

86.2 KB Created: 2021-07-30 02:56:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c54189d415a49ac9bbe111bfeb782161 SHA-1: 536703c5c215f45ffd1c4a7dc83f003c43968f40 SHA-256: 6eb3a45db1a6627ee9101fdffa852c598858dd78e64b4b62cfb8ecb98d1fc5de
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links pointing to compromised WordPress sites, suggesting a phishing or malware distribution campaign. The presence of multiple PDF_URI and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics indicates a deliberate attempt to host malicious content on seemingly legitimate but compromised infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/3314f65ccdf3cdc3fc0b0f87a63fe8d0/jixunerobopazukeraj.pdf In PDF document text
    • http://beta-rc.com/upload/files/lopokawo.pdfIn PDF document text
    • https://sardavetri.it/userfiles/file/51786833052.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a84081023c---zirupizewunosejedani.pdfPDF link annotation
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/3a3d7a0fef027bb991050fc04b4f91b3/11089039685.pdfIn PDF document text
    • https://citronel.com/userfiles/files/rinedeju.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce7db3ab7a---posolaga.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/c80d87f62232e1948d2a93a8e795aa61/39980396199.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a57b42c571c---28037324234.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d2674cc7b---53750078359.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eb2e8d4a1d---vufetenunotud.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/71b25c688f40bdf1fb22632efafdf93c/tekama.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/66d6426cf2ffe96adff2c3ee7c7d42cf/48685037771.pdfIn PDF document text
    • https://bocion.com/ckfinder/userfiles/files/kipixagu.pdfIn PDF document text
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/39180e4ccb87cd253d502b7c3e087e76/muvizepik.pdfIn PDF document text
    • https://gachbinhduong.com/upload/file/87601936328.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/mhhi7bi4lm3ouhkiff213r1rt0/78726812051.pdfIn PDF document text
    • https://vishalahospitality.com/ckfinder/userfiles/files/bijikojediduwakokunal.pdfIn PDF document text
    • http://suachuadienlanhhoaphat.com/hinhanh_fckeditor/file/fosigesuvisibapititij.pdfIn PDF document text
    • https://motelandratecuci.ro/userfiles/file/91294099404.pdfIn PDF document text
    • http://neoneophytou.com/ckfinder/userfiles/files/16483898206.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16087617e3c6bd---19308484852.pdfIn PDF document text
    • https://xn----7sbbjg7ctfs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/232aff6790303a47cdd8de77e84d1c2e/nenagofomitudajozade.pdfIn PDF document text
    • https://ancoraeducacion.com/images/vuputufivuzaluni.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/ck15n9fvcejjdltlp1ah410mt2/vogipisazolesatugafagag.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=allah+hu+allah+hu+allah+naatPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6DF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eef0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF0 16316 bytes
SHA-256: 5f31594860bc7c932539248b5e905ca6855b749e4e10a227ee4f8ad07aed193c
font_02_sfnt_off00010525.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10525 17776 bytes
SHA-256: 0a9e89000991f9218e20b1b334371fd7e5f4f6b2308e37d894b91b15ab3b5500
font_03_sfnt_off0001335c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1335C 9672 bytes
SHA-256: be21a8eb0180fe57c78a43a675075c1d1bec304567b4cb08ae495e92263d3009

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