Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe2126274c557936…

MALICIOUS

PDF

67.8 KB Created: 2021-09-13 08:58:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 3a5571a5184b923a2a2c0be19b4ab8aa SHA-1: fb90a4632fab7fe2220354b0e9ae45f782f7d63a SHA-256: fe2126274c557936b596cfa084aa044238f61304562a817c2202440b92de1289
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many hosted on disposable domains, and is identified as an image-only lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 2 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://catamma.ru/uplcv?utm_term=how+to+set+a+downloaded+ringtone+on+android PDF link annotation
    • http://union.travel/ckfinder/userfiles/files/19215929564.pdfIn PDF document text
    • http://www.roosprommenschenckelfoundation.nl/ckfinder/files/files/43183050436.pdfIn PDF document text
    • http://morpheus-architects.com/file_media/file_image/file/93458217783.pdfIn PDF document text
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130912171278---22836674352.pdfIn PDF document text
    • http://thuduchouse.vn/pics/file/tipasevililujevid.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139c2e189f6c---nafafodesoniju.pdfIn PDF document text
    • https://bevasilicones.in/userfiles/file/malunupojivigupudufom.pdfIn PDF document text
    • https://omprintandpack.com/userfiles/file/xijov.pdfIn PDF document text
    • https://architektor.ru/uploads/file/vagofiduwosovodibomezu.pdfIn PDF document text
    • http://aallergy.netlovestories.com/upload/files/25560715892.pdfIn PDF document text
    • https://pernambucoimortal.com/imagens/files/doxite.pdfIn PDF document text
    • https://ichapps.peaceofworld.com/ichapps/ckeditor-ckfinder-integration/uploads/files/14026757837.pdfIn PDF document text
    • http://sriagasthiyarastro.com/FCKeditor/userfiles/file/7949735384.pdfIn PDF document text
    • http://qualityspices.in/ckuploads/files/sowozugilomupupa.pdfIn PDF document text
    • http://przychodnia-felinskiego.pl/uploads/editor/file/36219311589.pdfIn PDF document text
    • http://poptheme.cn/uploadfile/files/20210908_140218.pdfIn PDF document text
    • http://gocoachfox.com/userfiles/file/sabixewaxubamutidoxuja.pdfIn PDF document text
    • https://inprovitcentroamerica.com/ckfinder/userfiles/files/45666506390.pdfIn PDF document text
    • http://www.valathors.com/ckfinder/userfiles/files/pukowi.pdfIn PDF document text
    • http://bluekeydigital.com/images/pic/file/69875081179.pdfIn PDF document text
    • https://liftsystems.ro/LiftFiles/file/64177758200.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/161390124bf90c---77913242943.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_off0000ae34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE34 10500 bytes
SHA-256: eb405d90f2eb40da8ad479e2089b909aa7bd217fdbf39818221668318ad66668
font_01_sfnt_off0000c601.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC601 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000de13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE13 14292 bytes
SHA-256: f07e5c950cbd08ddfc922040816ed220d31df7b9cbb4529c88acb9095b099b08