Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2221deec3402ac4…

MALICIOUS

PDF

82.2 KB Created: 2021-04-05 01:43:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: df3f99bf016a6e67d04a735a4c3f45ae SHA-1: f534939b7e3054a6fe315a4b7d3ae0b5144f02a0 SHA-256: c2221deec3402ac48011d2382bd0a5a117c2a4d0215271d028b07127e0c358b0
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which point to suspicious domains and are likely part of a link farm designed to host malicious content or phishing pages. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. The embedded URLs suggest an attempt to redirect users to potentially harmful sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://resalured.ru/wix?keyword=pantone+formula+guide+solid+coated+%2526+solid+uncoated+pdf PDF link annotation
    • http://usesol.xyz/81910125225e4k54.pdfIn PDF document text
    • http://ketrovk.xyz/207520625795u36e.pdfIn PDF document text
    • https://mugunerer.weebly.com/uploads/1/3/4/4/134479547/zoxapuk.pdfIn PDF document text
    • http://kolaxowivod.22web.org/mukow.pdfIn PDF document text
    • http://shoppingyxplus.xyz/40597773863ff1gv.pdfIn PDF document text
    • http://bujufamamaw.22web.org/spell_checker_online.pdfIn PDF document text
    • https://dorikorojuj.weebly.com/uploads/1/3/3/9/133987202/kubasorupekaso-ziwababunowaz-gukalozir.pdfIn PDF document text
    • https://zowatiloni.weebly.com/uploads/1/3/0/7/130739934/runibodazup_somex_kaziwob_xutenadaxorulad.pdfIn PDF document text
    • http://interbank.link/how_to_calculate_the_surface_charge_densitydu8ji.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://s3.amazonaws.com/kiremefegonar/why_is_my_smoker_not_getting_hot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c51ca24d-d84b-457c-acfe-30938d97662a/vupuredirakujumeximeto.pdfIn PDF document text
    • https://s3.amazonaws.com/tanapilamaxi/76910871746.pdfIn PDF document text
    • https://s3.amazonaws.com/gonima/11988420240.pdfIn PDF document text
    • http://ruwiluleter.epizy.com/what_are_the_seven_spirits_of_god_lds.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9424e00e-d1fb-4bea-8ff3-1a3b1624686d/what_are_some_examples_of_autobiography.pdfIn PDF document text
    • https://s3.amazonaws.com/tinezedu/87734750377.pdfIn PDF document text
    • https://s3.amazonaws.com/regovadeje/adobe_premiere_pro_cs6_free_apk.pdfIn PDF document text
    • http://tapipawobux.rf.gd/genetics_biology_textbook.pdfIn PDF document text
    • http://bawanakoj.epizy.com/tegewabutu.pdfIn PDF document text
    • http://lofoxos.epizy.com/nazanuvabupikumosisa.pdfIn PDF document text
    • http://vevodulezetom.rf.gd/answers_to_interview_questions.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://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8F4 5340 bytes
SHA-256: 8d2297faff6eb4e8a9b39c107c39cf6fdf0a590658a3bf93228ce224c0fb7aa6
font_01_sfnt_off0000eb06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB06 7148 bytes
SHA-256: ffdd590bfdbab459dc9dcc3458ef3842620453808534791927f07b47db88175c
font_02_sfnt_off0000fe69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE69 10936 bytes
SHA-256: 91cd63a7e0302d2ebe3daa0cdc1eb51829d485d43b574785fec0257e7fa16880
font_03_sfnt_off000123eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123EB 16164 bytes
SHA-256: ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8

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