Malicious PDF — malware analysis report

Static analysis result for SHA-256 622fcaf496c791d8…

MALICIOUS

PDF

67.7 KB Created: 2021-09-09 19:01:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-25
MD5: fb9ec2eb0b3c85d9c006b8a564459f25 SHA-1: 5e3bd9fc1977a53edc701bef0c55fc23187d1c86 SHA-256: 622fcaf496c791d89f87321e5da6df25a81aa602a2a629815565cd21c895af6f
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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 http://rickgrisolia.com/userfiles/files/9373276020.pdf In PDF document text
    • http://cluboutletmoto.net/campannas/file/36077647043.pdfIn PDF document text
    • http://interroadholland.nl/userfiles/file/gixujinedejorip.pdfIn PDF document text
    • http://www.samuitns.com/image/upload/File/88596162717.pdfIn PDF document text
    • http://fertilizerproductionprocess.com/d/files/38717777226.pdfIn PDF document text
    • http://jobsandhi.com/uploaded_files/userfiles/files/24386404524.pdfIn PDF document text
    • http://decamiones.com/userfiles/file/22078167013.pdfIn PDF document text
    • https://hahapediatric.com/uploads/files/202109032100205957.pdfIn PDF document text
    • http://kawana.tech/userfiles/file/worifogixe.pdfIn PDF document text
    • http://goldenmallbiotech.com/upload/files/65858796527.pdfIn PDF document text
    • http://1yunnan.com/ckfinder/userfiles/files/peduzupaxunezobigaful.pdfIn PDF document text
    • http://wxhsbl.com/ckfinder/userfiles/files/20210905_035550.pdfIn PDF document text
    • https://www.bussmann-tiefbau.de/ckfinder/userfiles/files/vakupofisumopezipa.pdfIn PDF document text
    • https://washlounge.in/ckfinder/userfiles/files/muzodobanafagazarirufodi.pdfIn PDF document text
    • http://abwwilson.com/uploads/files/87013401722.pdfIn PDF document text
    • http://focalthai.com/file_media/file_image/file/70109879629.pdfIn PDF document text
    • http://elfast.ru/userfiles/file/bubovobemeguf.pdfIn PDF document text
    • http://poltinka.ru/userfiles/file/54594236377.pdfIn PDF document text
    • https://afra24.com/basefile/afra24/files/tixavidotuko.pdfIn PDF document text
    • http://toyotacri.com/userfiles/files/pafuzokavitajinonefikopek.pdfIn PDF document text
    • https://tipresentoio.it/images/file/59263497387.pdfIn PDF document text
    • http://gt-outillages.fr/ressource/site-image/files/sukugokabufuzofi.pdfIn PDF document text
    • http://another-partner.morefriendship.com/upload/files/28134797424.pdfIn PDF document text
    • http://www.azurwelcomeservices.com/userfiles/file/4898638336.pdfIn PDF document text
    • https://medtek.vn/storage/file/27971801308.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=can+we+download+fortnite+in+androidPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ae7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE7B 14240 bytes
SHA-256: 9eb3713b6e2f66ca877fba0689b1523155acde5286a59eac827e9f245517dcf0
font_01_sfnt_off0000d1a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1A4 10296 bytes
SHA-256: e2be0d0472b1e92eed4d9830b0496f35f4f1b0371f3a34674ceb8d06cf29debc
font_02_sfnt_off0000e8fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8FB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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