Malicious PDF — malware analysis report

Static analysis result for SHA-256 93e778ccd9207cdf…

MALICIOUS

PDF

69.8 KB Created: 2021-10-02 13:14:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 37b6af96f8b2473d1b204d2026e2718f SHA-1: e2b38a5f3fc2b1a7fb3cec7ca3c0691894ed5bcc SHA-256: 93e778ccd9207cdfc2bf834cdb15db5ca806eb6e63de108faaff3a4e787c345f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to suspicious domains and are likely used to redirect users to malicious sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests these URLs are part of a link farm designed for obfuscation or to spread malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://galerie-louise.be/userfiles/files/32983810014.pdf In PDF document text
    • https://pqclass.kr/imgs/file/diwafakevovolosub.pdfIn PDF document text
    • http://hzbmsj.com/images/upload/File/64234286700.pdfIn PDF document text
    • https://www.ewdel.cz/ckfinder/userfiles/files/62530551194.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/cfc32debf0c0f76a263b73c8378cb169/87868283769.pdfIn PDF document text
    • http://yuha.be/_files/file/67846601763.pdfIn PDF document text
    • https://www.ccs-corporation.com/ckfinder/userfiles/files/kuzide.pdfIn PDF document text
    • http://htk2.altrodesign.eu/ckfinder/userfiles/files/77315076726.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/0c31a698c04f99f2101fe2277ba78fec/7897247271.pdfIn PDF document text
    • http://oralrem.kz/ckfinder/userfiles/files/78607929253.pdfIn PDF document text
    • https://cliniquemyo.com/userfiles/file/44900010839.pdfIn PDF document text
    • http://www.travelwithtaangoo.com/img/file/71351026337.pdfIn PDF document text
    • http://audidalys.lt/ckfinder/userfiles/files/ropagupunagamod.pdfIn PDF document text
    • http://khodahoanglang.com/admin/webroot/upload/image/files/45034009963.pdfIn PDF document text
    • http://premiercontractinginc.com/files/file/denedoludipepokojivorono.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/defoli.pdfIn PDF document text
    • https://okinawa4d.com/contents/files/91901397855.pdfIn PDF document text
    • http://alhouti.com/userfiles/file/72007014119.pdfIn PDF document text
    • http://jtylek.pl/Upload/file/zerugeboxa.pdfIn PDF document text
    • http://oilspecchem.com/files/52737954242.pdfIn PDF document text
    • http://archive-2013.humandoc.pl/attachments/file/denakuziso.pdfIn PDF document text
    • https://harteron.ee/userfiles/file/gazugidokonopojebaz.pdfIn PDF document text
    • http://autoscuolepintozzi.it/userfiles/files/terasosidovudevowidopi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=how+to+take+good+beach+picturesPDF 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_off0000b0c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0C4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c8db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8DB 11052 bytes
SHA-256: 50462a919176dcb285798a342e24c6a8432c8dd0bda3263f050a6a821c6696bf
font_02_sfnt_off0000e256.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE256 15328 bytes
SHA-256: a3a0632093d5d8b4eed8d6e696d657f11762d5275353eff63e9ba92c27c72d11

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