Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6ae7863926c1e6a…

MALICIOUS

PDF

89.1 KB Created: 2021-07-19 07:41:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: c87b97ddfcea59b095877aec9c91191a SHA-1: c93cb17e86353820acc861e35ff7fc28436b4e89 SHA-256: b6ae7863926c1e6a81724cefdc3aba66a7ae9e88100e9b77bcc95371c1f15cb2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous links to compromised websites, likely intended to lure users into downloading further malware or submitting sensitive information. The presence of multiple links on disposable hosting and compromised CMS upload storage further supports its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://rustproofingottawa.com/userfiles/file/15427614456.pdf In PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/54p0cik9jmtp4di8vmfduj954i/govikikebowa.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084563d1f3d1---54416007353.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/q69r87rp1fvc2hmne0d3s53n18/25882543891.pdfIn PDF document text
    • http://alliusie.com/userfiles/file/27023868895.pdfIn PDF document text
    • http://abnicum.com/files/file/vemaxivosa.pdfIn PDF document text
    • http://sam-global.info/files/file/93959603984.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160867676f23a6---19567181019.pdfIn PDF document text
    • https://amursvoidom.ru/media/files/nakokenunobavimapesa.pdfIn PDF document text
    • https://xo-sound.ru/userfiles/file/95342696521.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a8f73c930f---xunesofo.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/16090c7dfa60b2---vemikofejomematuleres.pdfIn PDF document text
    • http://h-st.nl/bestanden/files/nafazonudunajitefo.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606caa193847d---kuwitazar.pdfIn PDF document text
    • http://homeopathyhongkong.cn/files/nidezodefafifidawuko.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/gjtmgdj2b0oo3jn18ptbetqkdo/99135609529.pdfIn PDF document text
    • http://ferrogep99.hu/static/media/file/25950690484.pdfIn PDF document text
    • http://stewartreunion2020.com/clients/2/2a/2a0d9dcdd57715375c9f4393c24df0f2/File/xedabudorigogaw.pdfIn PDF document text
    • https://abugfreemind.com/userfiles/file/kuliseluwisowi.pdfIn PDF document text
    • https://condominiobrisasdelnorte.com/userfiles/file/roneguvodaworigi.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/160b053f3e207a---89638180464.pdfIn PDF document text
    • http://lnaixi.com/userfiles/file/20210624020910_224323840.pdfIn PDF document text
    • https://audreyheselmans.com/_files/file/55472174716.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16091e8527843c---jaxuxegivip.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=happy+birthday+brother+funny+quotesPDF 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_off0000fa51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA51 11040 bytes
SHA-256: 4fd16400fdca8ca0b440aad7114b0059b7d9da0ab031aa3c7e6fa46604da4f28
font_01_sfnt_off00011384.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11384 17024 bytes
SHA-256: ad455a84ef312ce9335759686740fca56fc190e891bc4375c39d9a2540da8a09
font_02_sfnt_off00013fa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FA6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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