Malicious PDF — malware analysis report

Static analysis result for SHA-256 07e69b0dd77dbc06…

MALICIOUS

PDF

74.1 KB Created: 2021-09-11 03:57:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: c26be9222924c63b736fba71a21401e2 SHA-1: 8056487fde3cf1f135350232242f3d2d9864cf96 SHA-256: 07e69b0dd77dbc06385f6aaf4b3c8b363ac297f1719a1ed86e45385094dc52fa
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to websites hosted on compromised CMS platforms or disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://elite-nails.pl/Upload/file/moxokugejuvaxutajisibosir.pdf In PDF document text
    • https://soi.icami.mx/ckfinder/userfiles/files/84511499940.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132b481b88f2---mumafuwelobod.pdfIn PDF document text
    • http://gnox.vn/upload/files/92171195448.pdfIn PDF document text
    • http://aibasylhet.edu.bd/app/webroot/ckfinder/userfiles/files/85283768813.pdfIn PDF document text
    • http://mikailang.net/userfiles/file/20210906003826_732657658.pdfIn PDF document text
    • http://dryoucosmeceutical.com/userfiles/files/30215007941.pdfIn PDF document text
    • http://didaconcept.com/admin/fckeditor/file/74897729986.pdfIn PDF document text
    • http://tianfonmm.com/d/files/kokanonineg.pdfIn PDF document text
    • http://zelene-centrum.cz/webpagebuilder/ckfinder/userfiles/files/ginefexisobexowapuxuloma.pdfIn PDF document text
    • https://jeevandeepspecialcare.com/ckeditor/ckfinder/userfiles/files/6890958863.pdfIn PDF document text
    • https://suacuacuontoanphat.com/upload/files/89143766306.pdfIn PDF document text
    • http://assessmentinsight.com/ckfinder/userfiles/files/26396468178.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/5f2f00e4bcdeb9c8c2a3923a50973798/sigewo.pdfIn PDF document text
    • http://watdoenwevandaag.nl/upload/6873250885.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/161388cef43ddd---74510959883.pdfIn PDF document text
    • http://ebd.su/UFD/7623/files/21623743480.pdfIn PDF document text
    • http://ckud.handysociality.com/upload/files/wemevevimemaxumewuregaz.pdfIn PDF document text
    • http://headlinesdinerla.com/uploads/files/fewafuvirinojalan.pdfIn PDF document text
    • http://modernplating.com/userfiles/file/15951275242.pdfIn PDF document text
    • http://yangs-ns.com/ckfinder/userfiles/files/20210911064615.pdfIn PDF document text
    • https://greenbins.ca/ckfinder/userfiles/files/riwavasapamolevomeme.pdfIn PDF document text
    • https://nordavril.com/userfiles/file/62339130910.pdfIn PDF document text
    • http://kleiberit.ru/files/file/83350971696.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=need+for+speed+underground+2+mod+apkPDF link annotation
    • https://rt9.rspo.org/ckfinder/userfiles/files/51908959394.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_off0000bbc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBC4 17564 bytes
SHA-256: d59234b06be7d9b4ecae5683a9beb7ef8838f261d3d2ab4bf132aa2d852b87c0
font_01_sfnt_off0000e9d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D0 10892 bytes
SHA-256: eaf8c9df168ee6605aa65ebefd7c7a7822e6e2dce587bdd3389c33c45cef035b
font_02_sfnt_off000102e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102E2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1