Malicious PDF — malware analysis report

Static analysis result for SHA-256 30711eba55a33f9a…

MALICIOUS

PDF

85.2 KB Created: 2021-09-18 13:58:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a6756dd045e4c2d9b19b737a61b7fa43 SHA-1: d655b1173521937887909824de5ec1f48068d002 SHA-256: 30711eba55a33f9a292460b162bce35a6b0f0fcf40c6d8a7a8908f7b8b590f26
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs pointing to disposable hosting, indicative of a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links. No scripts were extracted, but the PDF structure itself is the attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://allytemp.ru/uplcv?utm_term=best+manga+reader+app+android+free PDF link annotation
    • http://design-klasse.de/ckfinder/userfiles/files/48176741286.pdfIn PDF document text
    • https://mimpishio2bet.net/contents/files/26887498824.pdfIn PDF document text
    • https://hirurgija.me/files/15461464196.pdfIn PDF document text
    • http://saipanbooking.com/FileData/ckfinder/files/20210912_A4E83CECEFD5320E.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1612eaea7a846e---gosejibunuvokunezut.pdfIn PDF document text
    • https://delphin-restaurant.com/ckfinder/upload/files/96478572115.pdfIn PDF document text
    • http://otohondamientay.com/upload/files/91438245380.pdfIn PDF document text
    • https://groupekheidri.com/ckfinder/userfiles/files/karakenijagi.pdfIn PDF document text
    • https://goodmix-psc.com/userfiles/files/52745959436.pdfIn PDF document text
    • https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/56f1736683bc0c1d21741c1f2dd5a96b/58887817978.pdfIn PDF document text
    • https://cosplay-expo.it/ckfinder/userfiles/files/11728703005.pdfIn PDF document text
    • http://jlicentral.com/images/authors/file/xofivenadoje.pdfIn PDF document text
    • https://creativenursery.net/home/creative/public_html/ckfinder/userfiles/files/23713235213.pdfIn PDF document text
    • https://eventpro-kontraktorpameran.com/uploaded/files/sinoz.pdfIn PDF document text
    • http://anthonyjcincottalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tiparamokawoxo.pdfIn PDF document text
    • https://medicentrumnz.eu/medicentrum/files/file/naxoberigale.pdfIn PDF document text
    • http://canphantich.net/Images_upload/files/62572208388.pdfIn PDF document text
    • http://winkeleninzundert.nl/uploadimages/files/jinemogobaboluva.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/161328219bbaeb---fapufekubabepaxak.pdfIn PDF document text
    • https://semagro-msw.ru/pics/images/file/tixejanow.pdfIn PDF document text
    • http://pokorny-podlahy.cz/UserFiles/File/pifavokufufisebop.pdfIn PDF document text
    • http://ailizia.com/userfiles/13429631921.pdfIn PDF document text
    • https://www.seblocation.com/ckfinder/userfiles/files/saxofotorixesosarilad.pdfIn PDF document text
    • https://b2cdemo.tickets.com/content/files/47250655759.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_off0000e8b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B9 10848 bytes
SHA-256: 6096ff26a1f028b06233c1ca2a3a43ded48a757e97a7c39555b876bcef635e53
font_01_sfnt_off00010189.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10189 17528 bytes
SHA-256: 843a0c28507297c0965ddef51d31386813a79c61ea77e1e3b01e35d18ede49b6
font_02_sfnt_off00012f37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F37 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1