Malicious PDF — malware analysis report

Static analysis result for SHA-256 683e3d031d6e421e…

MALICIOUS

PDF

74.7 KB Created: 2021-09-19 12:46:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 7f252a3c18b1842324779308c0404096 SHA-1: f46f21da13132f4f4482cd06c74e693dad188972 SHA-256: 683e3d031d6e421e95471384b011f08e045d30193d4e88343b4e9bc8bb2f0bc0
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for delivering malicious payloads. ML and ClamAV detections strongly indicate malicious intent, likely to download and execute a second-stage payload. The presence of numerous external URIs, many pointing to disposable domains, suggests a phishing or spamming campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

Heuristics 6

  • 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.
  • 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 http://homespakistan.net/magzine/uploadfiles/file/tajolove.pdf In PDF document text
    • http://www.enjoyvaltellina.it/admin/ckfinder/userfiles/files/74127990236.pdfIn PDF document text
    • http://cedule-plachty.cz/files/file/fukuzanebe.pdfIn PDF document text
    • http://jump360.co/upload/files/20210913211535.pdfIn PDF document text
    • https://flyags.com/editorResources/file///16541531878.pdfIn PDF document text
    • http://mofrantech.com/userfiles/file/60853609810.pdfIn PDF document text
    • http://zhouzhuank.com/v15/Upload/file/202194232995516.pdfIn PDF document text
    • https://hyosungulf.com/uploads/file/91064263141.pdfIn PDF document text
    • http://nwatchonline.com/userfiles/file/kojinuruvinigusemiripesus.pdfIn PDF document text
    • http://lenosada.sk/editor_uploads/files/duvititasaxuneperutid.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1612fd08bc4efb---gemav.pdfIn PDF document text
    • http://gaishachuukobuhin.com/js/upload/files/wixodasagi.pdfIn PDF document text
    • http://lube-stc.com/ckfinder/userfiles/files/xokofavenamutosujepasu.pdfIn PDF document text
    • http://exim5.hu/_user/file/81191042865.pdfIn PDF document text
    • https://bahispesinde.com/gnc/veri/_files/66582685601.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fecbdaabaf---55033070757.pdfIn PDF document text
    • http://jiji.pgo.tw/pic/uploads/files/lefapedizupujaleriguzize.pdfIn PDF document text
    • https://art-lamps-rali.eu/files/file/narowewuwoguzuredizute.pdfIn PDF document text
    • https://lotte-ppta.com/beta/assets/file/13562185840.pdfIn PDF document text
    • http://paron-rebondir.com/uploads/files/gamewowizodipagaz.pdfIn PDF document text
    • http://wmc21.com/ckupload/files/26938579607.pdfIn PDF document text
    • http://clingac.com/d/files/gimebitegap.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=animate+textview+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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b8b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8B7 19768 bytes
SHA-256: 5ccbf41502147deaaa8aa3b97ac8280bf40c7083dcb79764c06a73c6c679bab0
font_01_sfnt_off0000ec1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC1A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010431.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10431 10428 bytes
SHA-256: 29629d8581e3731025abd5017cd97e62b6f9907b0d64a3c165c5a6b1b26ffabc

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