Malicious PDF — malware analysis report

Static analysis result for SHA-256 abd3d68d99e5636c…

MALICIOUS

PDF

80.9 KB Created: 2021-09-20 10:04:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9dec0075b809a6789e1fa39e33603a82 SHA-1: 97b82916e2e2d8ae3e9a45f990b8bf4c5342dcf6 SHA-256: abd3d68d99e5636c439faeee77457393c196d6a62f48e24d332324a2134df21e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URLs, many of which are hosted on compromised or disposable domains, indicating a phishing or SEO manipulation attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://huntic.ru/uplcv?utm_term=dragon+ball+games+on+play+store PDF link annotation
    • https://mi-stores.com/basketballtotaal/images/editor/file/87900481483.pdfIn PDF document text
    • https://biroestarsa.hu/uploads/file/rekogivedagim.pdfIn PDF document text
    • http://urbanelect.com/userfiles/file/xexuvetexetazidupava.pdfIn PDF document text
    • https://faktxeber.ru/resimler/files/besekimo.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613583bb8575b---59422211939.pdfIn PDF document text
    • http://twozonechickenlasvegas.com/uploads/files/12255820587.pdfIn PDF document text
    • http://bebaldebaran.eu/userfiles/files/8682146022.pdfIn PDF document text
    • https://bikeid.net/ckfinder/userfiles/files/99022967421.pdfIn PDF document text
    • https://skinrepublic.vn/webroot/img/files/fubef.pdfIn PDF document text
    • http://dijladentalcenter-qa.com/userfiles/file/39946357204.pdfIn PDF document text
    • https://tatsolarlight.com/uploads/files/dexutegonifamewi.pdfIn PDF document text
    • https://gmt-tw.com/app/webroot/userfiles/files/nutamamupiz.pdfIn PDF document text
    • https://pmms-online.com/assets/file/jojaw.pdfIn PDF document text
    • http://xn--9i1b14l32gg2dsybq3b.com/upload/fckeditor/file/vipemefononezojegekojofa.pdfIn PDF document text
    • https://cpc-serbia.org/js/files/wanoj.pdfIn PDF document text
    • https://a-guskov.ru/uploads/files/wazexufutotiwubajepovote.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/kidategebuki.pdfIn PDF document text
    • http://space-edge.com/upload/files/kojowenadibenilibabemotug.pdfIn PDF document text
    • http://quangcaosms.org/media/ftp/file/jidazajiliwiwawovabud.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/5c9459c7861d8a310664faf4833717fb/wotujeduzojosijoxoforile.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/161350c3023560.pdfIn PDF document text
    • https://kiaavcilar.com/upload/ckfinder/files/sesagoxibavituwel.pdfIn PDF document text
    • http://zh-huaxun.com/uploadfiles/files/81851885202.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_off0000d639.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD639 18096 bytes
SHA-256: d3c51a6e56c88d26bf023dfb8dfe51070f375f4669363acd67fae86219514307
font_01_sfnt_off00010574.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10574 10760 bytes
SHA-256: b697d3000df24af90cbb61269d311fa7eb6b261c5dbb8c8b0bef372b974b41e7
font_02_sfnt_off00011e0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E0A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1