Malicious PDF — malware analysis report

Static analysis result for SHA-256 98fdec93c01e02a2…

MALICIOUS

PDF

85.1 KB Created: 2021-06-26 01:17:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 8878498b5af33e2cbf17f13e0c0305ea SHA-1: 966fd56eb9fcf3811851ace38603e1a32c089d36 SHA-256: 98fdec93c01e02a223d459adcd6a0813373cdfaede31979e7d4d3edcde350715
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs and links to compromised CMS uploads, indicating it functions as a link farm designed to redirect users to malicious sites. The primary goal appears to be directing users to potentially harmful content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://pistant.ru/uplcv?utm_term=management+science+decision+making+through+systems+thinking+pdf PDF link annotation
    • https://salubrismd.com/wp-content/plugins/super-forms/uploads/php/files/2590e64e49c0ba6c9b1348ec06237cb4/monasukemileriwuwexaguvew.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/trhlk4udtvjk7o2qsj1k7c32m9/dizukatifasizitememejeje.pdfIn PDF document text
    • http://aliceinformaticasrl.com/user/pages/merilanabomepotumarujom.pdfIn PDF document text
    • http://isystemlab.com/admin/ckfinder/userfiles/files/37840928563.pdfIn PDF document text
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/go1uoageqvda8l0mbk1ljmacoo/vukizidazezolurogirogi.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c3ead24cf7e---pegesatutubiditolo.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/3jutj5mivc06rstr7s3719hbn1/nugululipexotajevuxosivod.pdfIn PDF document text
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1608960b88a7c5---vapokizix.pdfIn PDF document text
    • http://insidethedigitaltrend.com/userfiles/file/xofikuwigepixugez.pdfIn PDF document text
    • https://observatoire-omic.org/documents/file/tonasidiwuwekef.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/vf5gdkj8bok51arp9i98d9c56o/tivojesafotid.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6d66298771---demitinebagapabi.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/b671819a296bb20da74581e1c26ec6b1/26418555732.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/160b03acce77d4---93223644509.pdfIn PDF document text
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/e1b17b7c13b5b6aa1142ef19a493e9f8/66918095282.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/d5ed512a9613d1f3e68c92efcfb992d0/78167927816.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/1608ebca764d12---xotedavaduxikum.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbb4b6a077f---68460148631.pdfIn PDF document text
    • http://eko-inwest.eu/upload/file/37299464779.pdfIn PDF document text
    • http://gptools.net/userfiles/file/rojagusojafozu.pdfIn PDF document text
    • https://alutat.com/data/file/11366868744.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b3ead790c5a---lifusojuxiwawed.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160c4d7b31dcfd---vozebativezoveloguv.pdfIn PDF document text
    • 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_off0000e98e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE98E 16444 bytes
SHA-256: 4e6417cd041344b552cadbca0d57f3ca110c157972aa08b0b773fe97d5a30dcd
font_01_sfnt_off00011435.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11435 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012c4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C4C 11320 bytes
SHA-256: 2eaf8a433257a8c9c6576a922761310e4853fe97427cf4bf8e69d8ac62aaf96e

Open this report in the interactive analyzer, or submit your own file for analysis.