Malicious PDF — malware analysis report

Static analysis result for SHA-256 8947a0dbe0e14f32…

MALICIOUS

PDF

81.7 KB Created: 2021-09-18 05:45:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: f2892023c87825d16cc10674535feb44 SHA-1: 83c1745de485afd3c98f9531511588c71fc36101 SHA-256: 8947a0dbe0e14f3212efcacb7adacb95f48a243205624157a48a98635ae7f2ed
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a significant number of embedded URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to obscure the ultimate destination. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://szpk.hu/_user/file/fajexurukadafede.pdf In PDF document text
    • https://educhina.mn/editor/files/2882409548.pdfIn PDF document text
    • https://nutritie-metabolism-sanatate.ro/app/webroot/files/userfiles/files/bigopomuwu.pdfIn PDF document text
    • http://xn--b1agpbmdtf.xn--p1ai/upload/file/38103890160.pdfIn PDF document text
    • http://shippingengineering.com/files/ckeditorothers/begini.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1614546979134c---51663863153.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/2rciao97ah9r08p9k91ocjpil1/susudoxavorox.pdfIn PDF document text
    • http://sotel-perm.ru/site/file/gokujejefixapexumizutoli.pdfIn PDF document text
    • http://michaelwilliamslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/worenafebuwebozezevurotex.pdfIn PDF document text
    • http://gocoachfox.com/userfiles/file/separotojawizo.pdfIn PDF document text
    • http://eugensa.lt/app/webroot/uploads/userfiles/files/xelisegukudododa.pdfIn PDF document text
    • https://tsydesign.com/userfiles/jws/files/7003575993.pdfIn PDF document text
    • http://760_709737661.mildmedia-dev.eu/uploads/userfiles/files/lipazazukedodeluguwusige.pdfIn PDF document text
    • https://polandpools.com/contents/files/siwugazab.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/0237b565bf7f673b2142ccb6a3353f31/27731650808.pdfIn PDF document text
    • http://a-kamen.com/userfiles/file/jizavibafudob.pdfIn PDF document text
    • http://alt-1c.ru/userfiles/file/pumabikarusinazilaremez.pdfIn PDF document text
    • https://ibshospitals.com/userfiles/file/kaferakosotubupune.pdfIn PDF document text
    • http://prefinancovaniehypoteky.sk/res/file/88679881287.pdfIn PDF document text
    • http://gsnursing.in/ckeditor/ckfinder/userfiles/files/dozowezape.pdfIn PDF document text
    • https://www.weldcor.ca/public/ckfinder/userfiles/files/sigowazopexi.pdfIn PDF document text
    • https://vinamex.info/uploads/news_file/purin.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139f11b08e7b---wonapog.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=playing+videos+on+android+autoPDF 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_off0000d9a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A4 18124 bytes
SHA-256: 1a5677920002e8eb244a9bcf1587326c0cc0bb672acb5b031a13264fcbf69f82
font_01_sfnt_off00010854.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10854 10704 bytes
SHA-256: e4edaeccfeda227a739bc87271ab7fa6563615ba0011bf35288fc1d4933cfec9
font_02_sfnt_off000120dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120DD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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