Malicious PDF — malware analysis report

Static analysis result for SHA-256 72e933bc4f765b3a…

MALICIOUS

PDF

70.3 KB Created: 2021-09-12 11:32:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 108f1a76f6a397c5334a7fb800aace29 SHA-1: aae56c0f2c4602f6fdd5ffc40d00cb17b05cf802 SHA-256: 72e933bc4f765b3a6b2971da74f6ebe1da77dc48c52d0ed967b2c8980d774b7a
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier. It contains numerous external URLs, many of which are part of a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. The PDF structure and embedded URLs indicate an attempt to redirect the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6367

Heuristics 4

  • 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
  • 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://queure.ru/uplcv?utm_term=raft+survival+online+apk PDF link annotation
    • http://parkergeneralcontractors.net/userfiles/file/woxozuxozuw.pdfIn PDF document text
    • https://seeyounow.net/userfiles/file/zulumibibimodamiraduvir.pdfIn PDF document text
    • http://pinxedien.net/upload/files/72672280716.pdfIn PDF document text
    • http://sellmysayarah.com/userfiles/files/78128375212.pdfIn PDF document text
    • https://gruppopolidori.com/upload/image/file/83869481724.pdfIn PDF document text
    • http://fasson.vip/images/editor/files/jaxiruzez.pdfIn PDF document text
    • http://zhouzhuank.com/v15/Upload/file/20219111116556444.pdfIn PDF document text
    • http://redigonda.it/userfiles/files/90030544859.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134ac3e4173f---49200769888.pdfIn PDF document text
    • http://iknow.pl/files/file/vinebolofonijadabifi.pdfIn PDF document text
    • https://el-tall.pl/pics/file/97049443243.pdfIn PDF document text
    • http://xn--82ca1bkibi6eufn5bh1b7i3e.com/UserFiles/File/96117207615.pdfIn PDF document text
    • http://www.oneworldkarate.com/fckeditorimages/userfiles/file/favufisavazinitolitupava.pdfIn PDF document text
    • https://pingthye.com/userfiles/files/fomavovijavutudofalabu.pdfIn PDF document text
    • http://ricarda-allegra.de/userfiles/file/29888757689.pdfIn PDF document text
    • http://ats-dz.com/userfiles/file/bowizutexevob.pdfIn PDF document text
    • http://visit-pune.com/userfiles/file/62314501258.pdfIn PDF document text
    • https://thietkeweblongan.com/upload/files/71274580393.pdfIn PDF document text
    • http://crabandclaw.com/uploads/files/19195510089.pdfIn PDF document text
    • https://samudra99.com/contents/files/30713425878.pdfIn PDF document text
    • http://sswjeans.com/files/vajumefumozodoregatiba.pdfIn PDF document text
    • http://jszl-rolls.com/filespath/files/20210901202956.pdfIn PDF document text
    • http://wx-test.com/upload/ckimg/files/202109021217589149.pdfIn PDF document text
    • http://air-ned.com/uploads/files/12247909100.pdfIn 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_off0000b72f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB72F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cf3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF3C 1680 bytes
SHA-256: 6c08887b596ecb472c5a0482df8c2f828d83fc5b5d16111ed0caa1fced1b35dc
font_02_sfnt_off0000d739.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD739 10652 bytes
SHA-256: 5498a6b0893c981b2770efc039321c4e8baa6e0e1f8b880671036e6d3e89643f

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