Malicious PDF — malware analysis report

Static analysis result for SHA-256 62801b318a809d6f…

MALICIOUS

PDF

77.7 KB Created: 2021-09-13 13:54:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 6728f8536c9e518f4a573ee5da3620c2 SHA-1: 224067f94a76e2f5b965dd7e22ebf2aab008fde0 SHA-256: 62801b318a809d6f9a754ae7f07dc6b46ab0e034a19b18c8a0c57553b7afa73b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple compromised or disposable hosting sites. The document body is unreadable, but the presence of numerous external links suggests an attempt to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • 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.
  • 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 http://recviem.ru/img/upload/51361193043.pdf In PDF document text
    • http://veganogle.es/uploads/ckfinder/files/tinigukevaxilobibomigo.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1613c60c59d36e---30435686685.pdfIn PDF document text
    • https://vietrocknet.org/app/webroot/img/files/79013148450.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/16137738417a19---26348513888.pdfIn PDF document text
    • https://www.wemservice.com/ckfinder/userfiles/files/mofajilenuzuweboj.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/e75a39b65d8605c13ed30d3f0b3bdf4c/fagudiguf.pdfIn PDF document text
    • http://abcbyspu.com/ckfinder/images_store/files/44715450452.pdfIn PDF document text
    • http://varosom.hu/userfiles/files/xetadigo.pdfIn PDF document text
    • https://muzeumkonstancina.pl/attachments/file/34111987875.pdfIn PDF document text
    • https://eyetracking.pl/userfiles/file/67507743643.pdfIn PDF document text
    • http://lncxjzxxw.com/upload_fck/file/2021-9-13/20210913150839328319.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613e0f9ef4166---74103606865.pdfIn PDF document text
    • http://recuva.kr/upload/fck_img/1631260819/file/75847049540.pdfIn PDF document text
    • https://qatarsecurityservices.com/public_html/userfiles/file/kulozulevadoxomusami.pdfIn PDF document text
    • http://swancentive.com/cote_dor_import/admin/ckfinder/userfiles/files/26387291068.pdfIn PDF document text
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16131414e64d0f---70012527149.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133deb059986---baganufajor.pdfIn PDF document text
    • http://nebovsem.ru/app/webroot/files/files/84500718163.pdfIn PDF document text
    • http://samnakthodrahassob.com/userfiles/file/18819284684.pdfIn PDF document text
    • http://atletika-pardubice.cz/files/file/fugezelabokavab.pdfIn PDF document text
    • https://fptica.ru/images/file/wolebipip.pdfIn PDF document text
    • https://kop-trans.pl/uploads/userfiles/files/ladamamukevemi.pdfIn PDF document text
    • http://mayphatdienngocquang.com/media/ftp/file/jonoxas.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=degrees+of+adjectives+exercises+with+answers+pdfPDF 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_off0000cbcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBCB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e3e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E2 11236 bytes
SHA-256: 8531fa12cb252e34c62f3173b5593e523e0185432f22c6716cbd5413037ada94
font_02_sfnt_off0000fe03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE03 16572 bytes
SHA-256: 181de15944bba02b5839699dd6813c96105675a48d4b6d64f4895f18c28c858b

Open this report in the interactive analyzer, or submit your own file for analysis.