Malicious PDF — malware analysis report

Static analysis result for SHA-256 67fd73fe4f840695…

MALICIOUS

PDF

78.1 KB Created: 2021-04-10 17:27:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 0736727ffe13933601afb4df81bf59f4 SHA-1: e23c49b5e28e4c6cba23b3504213da9fb3859da9 SHA-256: 67fd73fe4f8406950dbf4cc5fa5e738fa5a7a77fb666b1dbbf5b87d206bebea2
266 Risk Score

Malware Insights

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

This PDF file exhibits multiple indicators of malicious activity, including a high ML classifier score and ClamAV detection as a phishing trojan. It contains a link farm with numerous external URLs, suggesting an attempt to direct users to malicious sites. The document also employs lures related to password protection and MFA, indicating a phishing or credential harvesting attempt. The presence of embedded URLs and the overall structure point towards a phishing attack designed to trick users into revealing sensitive information or downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 8

  • 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.
  • 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
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://dugedepap.ru/strik?utm_term=why+is+my+hp+deskjet+asking+for+a+password PDF link annotation
    • https://cdn.sqhk.co/zisuxemop/icvZ7a4/score_hero_level_339_glitch.pdfIn PDF document text
    • http://qwertyujg.xyz/how_to_become_a_coding_compliance_specialistgf59h.pdfIn PDF document text
    • http://classkaod.ru/filleted_accounts_directors_report6rquj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415742/normal_605fb4da61942.pdfIn PDF document text
    • https://cdn.sqhk.co/fatobaliv/xhhcbOs/reporting_shareholders_equity_on_the_balance_sheet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462339/normal_5ffa8b08a56b0.pdfIn PDF document text
    • http://hightrade.club/experiments_in_physical_chemistry_garland1qyeq.pdfIn PDF document text
    • https://cdn.sqhk.co/kikepedu/diakExt/musica_italiana_anni_70.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://dd67658a-cc17-4e1c-bca5-42bf299a485b.filesusr.com/ugd/07a440_292dfbedb9b84f79a069d1bcb552fc5a.pdf?index=trueIn PDF document text
    • https://899154e9-876a-4ab4-94d5-c8ef2aed10f2.filesusr.com/ugd/dcf9ad_9f735af908f546208f757fedb86630cd.pdf?index=trueIn PDF document text
    • https://dc383e6d-b7a3-4e67-a88a-227fa542b6c3.filesusr.com/ugd/72b0e7_b4d15faae20842bb95978b70fed8e4dd.pdf?index=trueIn PDF document text
    • https://c0e8410b-c394-4b36-8083-179878a46647.filesusr.com/ugd/d4b1dc_a8a41c2370d447f68b51c35d736e19df.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/bugaboo_carrycot_sheets.pdfIn PDF document text
    • https://9b08d158-0e0f-4203-9b31-e1272d977b1c.filesusr.com/ugd/086daf_b2f37d2f02444009b3ca1b6f623ee8bb.pdf?index=trueIn PDF document text
    • https://f7f2eb1f-4ce6-40bf-b337-6bcc2c9c1a95.filesusr.com/ugd/dc6899_11eb5980dd4541a6a1ef9213b31d3a4f.pdf?index=trueIn PDF document text
    • https://4c6480a9-ccec-4c20-853c-cc48681c44ad.filesusr.com/ugd/935adc_e9fa1e3aec8b453781abf6ebbfc038e2.pdf?index=trueIn PDF document text
    • https://d451e762-8e00-4155-9971-9512d28d2528.filesusr.com/ugd/b52961_75f8fa6ec0b84363918a914fb0d231b4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lofese/4143984565.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e590.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE590 5556 bytes
SHA-256: 7ef1028c03dabf7f9bf380e74964ebd0b967f0da9b53f6b06ca14568a4837e45
font_01_sfnt_off0000f86c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF86C 10660 bytes
SHA-256: a903f40e750955c78976f7dd6a1c057ba3a365e8bf5bc8e8ba9a65a853191bff
font_02_sfnt_off00011cd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CD8 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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