Malicious PDF — malware analysis report

Static analysis result for SHA-256 62644af427bf8ed3…

MALICIOUS

PDF

79.9 KB Created: 2021-09-17 02:12:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c3a826c26bccaf1e9a7a3846662ba592 SHA-1: 1f8c1d0ff7293dc63a92a0977e7ed62564364c7a SHA-256: 62644af427bf8ed3159e80a8bcfac166c79e9c33fafd15c93a402f4c1e44cb16
174 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and a high number of external URIs, many of which are part of a link farm on disposable hosting. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document is designed to trick users into downloading a password-protected archive, likely containing a malicious payload. The embedded JavaScript and numerous links suggest an attempt to download and execute further stages of malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://oniceh.ru/uplcv?utm_term=ppsspp+files+gta PDF link annotation
    • http://fotografoenricogiampieri.it/userfiles/files/79154240820.pdfIn PDF document text
    • http://isgsrl.it/images/file/52673533920.pdfIn PDF document text
    • http://eshop-kocicinadeje.cz/files/file/zixazilibinijariborer.pdfIn PDF document text
    • http://tayles.com/uploaded/61084009321.pdfIn PDF document text
    • http://neoneophytou.com/ckfinder/userfiles/files/rogujad.pdfIn PDF document text
    • https://clubberia.com/js/ckfinder/userfiles/files/13844589174.pdfIn PDF document text
    • http://wmc21.com/ckupload/files/puvezetakegusununewufo.pdfIn PDF document text
    • https://ww150001.linebot.net/upfile/files/20210908111236.pdfIn PDF document text
    • http://rrarental.org/upload/file/gejutuli.pdfIn PDF document text
    • https://magatek.com/documents/file/nunomu.pdfIn PDF document text
    • http://wanyuantemple.tw/userfiles/file/matiri.pdfIn PDF document text
    • http://accapierre.it/userfiles/files/67361991132.pdfIn PDF document text
    • http://geombiagioschettino.eu/userfiles/files/posavev.pdfIn PDF document text
    • http://yonseri.org/userfiles/files/vumedilumivamofuwo.pdfIn PDF document text
    • http://irinaburmistrova.ru/files/gekekagadizasum.pdfIn PDF document text
    • http://modnyi-buket.ru/uploads/files/faganotufuvoxetajovogita.pdfIn PDF document text
    • https://www.milestonesmn.org/ckfinder/userfiles/files/xutorewozig.pdfIn PDF document text
    • http://bowie.abwingsmd.com/uploads/files/61475416693.pdfIn PDF document text
    • http://zxpgw.com/userfiles/file/mafategugidem.pdfIn PDF document text
    • http://servicedental.it/userfiles/files/36660868888.pdfIn PDF document text
    • http://bunny888.com/ckfinder/userfiles/files/84441147115.pdfIn PDF document text
    • http://xn--b1afklwjc5g.xn--p1ai/ckfinder/userfiles/files/45829260960.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/4628001222.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_off0000d6e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6E7 10212 bytes
SHA-256: c7fb96eaf9760e7e13ad3500d9d460ca6f9f90d9109918735fd4f48e2980a7f2
font_01_sfnt_off0000edf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF3 17160 bytes
SHA-256: 847806941c031c236ec647fbde7233ea71871a926c7f401db8180ed502cd99b0
font_02_sfnt_off00011aa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AA0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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