Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6884d0d24d3d88a…

MALICIOUS

PDF

82.8 KB Created: 2021-09-07 00:57:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 387a82e746b9d6c69d0f1ba4589569e8 SHA-1: 52a4b988c12e23ed8c9a7f5d04c655201f862734 SHA-256: e6884d0d24d3d88a6965c146ddab8b6ece93590aced7c90101ff675610aa9e69
156 Risk Score

Malware Insights

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

The PDF file contains a link farm directing users to multiple external URLs, many of which are hosted on compromised CMS upload storage. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns suggest a lure to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607e1307f00e4---36990217280.pdf In PDF document text
    • https://songiadahoaian.com/upload/ck/files/90461795829.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c459b88ae7---lutivevosudevibusejozadi.pdfIn PDF document text
    • http://evola.it/userfiles/files/94191517027.pdfIn PDF document text
    • http://ccsctda.com/ckfinder/userfiles/files/20210730_053400.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/5h9fdqlsn4kpq8ugq3aoi75fe5/50786692936.pdfIn PDF document text
    • https://sitpchemcieszyn.pl/_sitpchem/file/sufusabagom.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d25821c97a2---62755036244.pdfIn PDF document text
    • https://vivaldiroberto.com/img/files/mediafiles/file/42866528160.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dbd1c9b36f---kovusetilewavebafimumuk.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/d076f3am69se9t8dn5lpfr2jo5/66303949253.pdfIn PDF document text
    • http://khiconghoixuancong.com/Khicong/admin/userfiles/file/wapopafelezigezilox.pdfIn PDF document text
    • http://kingalbertltd.com/uploadedfiles/file/70396261693.pdfIn PDF document text
    • http://pevak.info/UserFiles/File/dovigetifafifovuludubaba.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611dff7981d31---najapegijawojojewozoj.pdfIn PDF document text
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/43def2256ace2eb0eef7205d26cf7e0a/57619887299.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/s5e78rp3d9i1966nntcau6s8t5/lanavivosanegibos.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160719bbc7a8ec---niwufasubuxewijonosazaw.pdfIn PDF document text
    • https://remoteworkerclub.com/wp-content/plugins/super-forms/uploads/php/files/7e4b97cdd2f0d5c44ced8cffe7002653/87037150733.pdfIn PDF document text
    • http://interwork.sk/userfiles/file/36383590811.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608132feb2734---xuxapem.pdfIn PDF document text
    • https://lemarko.com/userfiles/file/fipelar.pdfIn PDF document text
    • http://droprint.my/home/ququ4923/public_html/userfiles/file/jenegoloborujixerusar.pdfIn PDF document text
    • https://www.nevjegykiraly.hu/userfiles/files/31520887959.pdfIn PDF document text
    • http://poorclarescork.ie/images/60250985334.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=aptitude+mcqs+with+answers+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_off0000e1d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1D2 16424 bytes
SHA-256: 9ec6be14d7ad64a54efc4177ecf0ae1782efdd3c8008f8e83de20fde8f2dbc70
font_01_sfnt_off00010c3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C3E 11032 bytes
SHA-256: 5febf7b80fbd1c4521ac67035eb512a269f0629e2fb177727b108c9a0e5eeb71
font_02_sfnt_off00012594.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12594 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1