Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d807ee01f4aac5c…

MALICIOUS

PDF

81.3 KB Created: 2021-09-11 02:09:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 96010d8bea43c881f830e388298fdcf1 SHA-1: 06c8e3a3e9f98b6c6b24dddbf8a8e89d8b08f73d SHA-256: 7d807ee01f4aac5cf8b507c4586bd39ec9f56d51b974363f6ac739a74d9f83f9
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external resources, many of which appear to be part of a link farm designed to obscure the true destination. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass security scanning. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://chcial.ru/uplcv?utm_term=mass+effect+infiltrator+apk+download PDF link annotation
    • http://1careglobal.com/upload/files/gugatofu.pdfIn PDF document text
    • http://qianshunqs.com/admin/upload/82341286357.pdfIn PDF document text
    • http://dragoniresorts.com/userfiles/buvijoj.pdfIn PDF document text
    • https://hankilfood.com/userfiles/file/20210909202000.pdfIn PDF document text
    • http://urbanelect.com/userfiles/file/22153689628.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613859ea09350---zoroxa.pdfIn PDF document text
    • http://micruts.org/userfiles/file/70316028809.pdfIn PDF document text
    • http://shimamura-mail-order.com/userfiles/file/wufopesisewolij.pdfIn PDF document text
    • http://metabolitplus.ru/files/file/rikisugotulazu.pdfIn PDF document text
    • http://gsxr.hu/userfiles/file/54572093041.pdfIn PDF document text
    • https://ciela13.leaddeehub.com/userfiles/files/xomemagewojefumugu.pdfIn PDF document text
    • http://apsons.eu/files/file/77909499462.pdfIn PDF document text
    • https://lapakunited.com/contents/files/zajepume.pdfIn PDF document text
    • https://www.colline-eternelle.com/ckfinder/userfiles/files/bezexafipo.pdfIn PDF document text
    • https://idealist.ro/userfiles/file/japugoderodibufero.pdfIn PDF document text
    • http://zoekidsworld.com/userfiles/file/nawiwepaxu.pdfIn PDF document text
    • https://comobrew.com/newsite/images/user_uploads/file/38290797407.pdfIn PDF document text
    • http://kliknetezde.cz/admin/obrazky/file/sizusarurasepigaloviv.pdfIn PDF document text
    • http://jyjwqj.com/uploadfile/file///2021090308040154.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613827122a933---lafeji.pdfIn PDF document text
    • http://www.polni.si/Images/files/sugatogazajavulakuzema.pdfIn PDF document text
    • http://rheumatology.institute/upload/content/file/malode.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_off0000d7a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A7 18092 bytes
SHA-256: e0c824c5a9c57e8a16714891bf6db8a44d436047abeaa96a1bc39951faa8ac74
font_01_sfnt_off000106b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106B4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011ecb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ECB 10784 bytes
SHA-256: 600b19c44b0ae9b51eddd2493b708eae177b2d20a1cd3984aa8e438db696fd30

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