Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe1cd2216fbdd6f4…

MALICIOUS

PDF

84.3 KB Created: 2021-07-09 02:56:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 149c5371a0a2fdea02d3670ad30c8354 SHA-1: d93d61e37240ac2bd0ea397f211c0441c77dd403 SHA-256: fe1cd2216fbdd6f4d9d7db84a6747815f3643f7da6731507cfc670e79f9db658
156 Risk Score

Malware Insights

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

The PDF contains a link farm directing to multiple domains, many of which appear to be compromised WordPress sites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution via these links. The document body is unreadable binary data, offering no direct clues to the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://speakingparrot.com/upload/ckfinder/files/xerusesazoneparijegekuba.pdf In PDF document text
    • https://humble-brag.com/wp-content/plugins/super-forms/uploads/php/files/1e21o07tekt3cag4k8a42telgp/63488670932.pdfIn PDF document text
    • http://qtjdb.com/UploadFile/2021/06/30/file/20210630_002117_147.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/16090944bb6bee---fimatigowakutatiruro.pdfIn PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/o6ou2m659a6g97jc636a34rqds/ximofonew.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/91751635734.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/16092e416ad878---kunidud.pdfIn PDF document text
    • http://seventyfirstclassof69.com/clients/60772/File/31730840835.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d43a1990c9---30021650183.pdfIn PDF document text
    • http://xetaihyundai.net/upload/files/63877271591.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d9e2ffd824a---24371386291.pdfIn PDF document text
    • http://burrburroughsfamily.com/clients/55468/File/zesoxusutepob.pdfIn PDF document text
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/57c421db67b282a9063e0976be6784e1/85154629005.pdfIn PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/qdr709db22gcsp0cnj0im10o9j/71508816626.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/249c332c86a146bec97057c7aff1fe7f/bipumed.pdfIn PDF document text
    • https://karapinarinsaat.net/userfiles/upload/file/mikirizigofexe.pdfIn PDF document text
    • https://wecareprogram.org/images/file/39867728882.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae38f52f3d7---64632908607.pdfIn PDF document text
    • http://s-privod.ru/userfiles/file/wemobi.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/06d66885ec1b766626bb9b22706267e1/34303169100.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160773aac0d048---29893356162.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/pedulilapavesubukipisafe.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a723d884b6d---fewazora.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/160b73774449c7---74801455125.pdfIn PDF document text
    • http://southport1969.com/clients/861680/File/89680568855.pdfIn PDF document text
    • http://wittlich-luexem.de/userfiles/file/tegelefimud.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=s+letter+calligraphyPDF 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_off0000e696.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE696 17564 bytes
SHA-256: 02f8b145a762e5e413b88548725fa40540fd57c180750edd1cd9f9d0719fb613
font_01_sfnt_off00011422.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11422 10452 bytes
SHA-256: 7aa924b371b9da7b6a47de5515fa995123ec101ce559f8941ea4938d269477d3
font_02_sfnt_off00012c02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C02 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1