Malicious PDF — malware analysis report

Static analysis result for SHA-256 68b2d2a3f92a430e…

MALICIOUS

PDF

84.2 KB Created: 2021-09-18 19:58:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 026b0cc19a2b9fb45e561df77dede580 SHA-1: a836ff2f4d925274b86dda4205b814728d517b48 SHA-256: 68b2d2a3f92a430eccd3bf2c312814cb83d8444271cccd508de9f70004c90bf9
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e5728cc5ca---97452667218.pdf In PDF document text
    • http://metabolitplus.ru/files/file/fijetawexozifub.pdfIn PDF document text
    • http://maximaviajes.com/FCKfiles/file/11460794147.pdfIn PDF document text
    • https://yingzhaoliuart.com/upload/file/nadojuxuvazapugotuwad.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/41445243585.pdfIn PDF document text
    • http://focalthai.com/file_media/file_image/file/31470734718.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/161343f6b56085---bafunuselovizenogewuge.pdfIn PDF document text
    • https://meesens.be/KrMee/Tekstverwerker/54224582168.pdfIn PDF document text
    • https://atlastoursntravels.com/userfiles/file/vibifozaxegukogulimokeji.pdfIn PDF document text
    • https://springkasteelhuren.be/userfiles/file/99333885067.pdfIn PDF document text
    • https://semot.com/Store/userfiles/file/10583868542.pdfIn PDF document text
    • https://mldom.xyz/web/img/podborky/files/doruvuzorow.pdfIn PDF document text
    • http://evo-models.com/uploads/userfiles/files/27532979378.pdfIn PDF document text
    • http://impressivetravelvietnam.com/upload/files/sepevevaxurafozovopusevi.pdfIn PDF document text
    • http://juha.be/_files/file/64649457233.pdfIn PDF document text
    • http://medicaldistri.com/ckfinder_files/files/12055579870.pdfIn PDF document text
    • https://drticket.ir/basefile/drtiketcom/files/45244440495.pdfIn PDF document text
    • http://historia-bfured.hu/userfiles/file/detuzow.pdfIn PDF document text
    • https://winpoasia.com/ckfinder/userfiles/files/mubarejigunepusave.pdfIn PDF document text
    • https://lawyerupsmart.com/tempimg/file/78878275699.pdfIn PDF document text
    • http://barudan.hk/UploadFile/file/20210911231656707.pdfIn PDF document text
    • http://nessium.net/userfiles/file/45797453296.pdfIn PDF document text
    • https://gruppopolidori.com/upload/image/file/71803712912.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=we+the+people+12th+edition+free+pdfPDF 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_off0000dfc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC1 19560 bytes
SHA-256: 2bbcc9d2e2bd05e313a7c9252155b43e90906954a3cb7576723b1af400530fb5
font_01_sfnt_off00011375.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11375 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012b8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B8C 10432 bytes
SHA-256: ea101f927d8a7cccb634e7cf8d14f7e5695f810dbff480babf420eaed2c15dfe