Malicious PDF — malware analysis report

Static analysis result for SHA-256 0032030b57cb4f08…

MALICIOUS

PDF

107.3 KB Created: 2021-07-24 01:43:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1425cc50f3cbb4971afb6608d7b71543 SHA-1: 2a577f927a29b434d7a01b2e9e79c00d120f635b SHA-256: 0032030b57cb4f08ef325e597abfce0eb3e36b373441722dcfad8af70e65e95f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or other potentially disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery through these links. The document body is heavily obfuscated and unreadable, providing no direct content clues.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9872

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://vattucongtrinh.com/userfiles/file/12211563828.pdf
    • http://www.anclupnapoli.it/userfiles/file/9133221322.pdf
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/e8400g39ufu980ie8crkm0lhq0/jadobezemumuzaf.pdf
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/2710t1u7phvhc4ti4ol6gn78da/magixesitemelowevalin.pdf
    • http://donkaew-furniture.com/ckfinder/userfiles/files/kofirilitima.pdf
    • http://hosungtour.com/FileData/ckfinder/files/20210614_9AC0C38AEAEE30CA.pdf
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160f8f1889745e---45285795998.pdf
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/443976ccda0cd89b7936b6135c49319c/nefafilukixewetadalix.pdf
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b214489a7cd---bukojamologiwuziwume.pdf
    • https://nutricionintravenosa.com/wp-content/plugins/super-forms/uploads/php/files/fca8e0e2c6ad24779434d07408a04605/joxawana.pdf
    • http://doverhighschoolhalloffame.com/clients/2/2d/2d76883e1086210ef8e2c43836b0327f/File/vimugivewasolebiwidej.pdf
    • http://babamoleskine.com/files/file/minizu.pdf
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16095a72eef831---pefaguviginuromar.pdf
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160ae9058dcb07---zakunopadezit.pdf
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/4e60d69acc73f555c71b4d899e9e726b/nuxiwepawevunux.pdf
    • http://beijingxinzhi.com/userfiles/file/20210507221749_1153749213.pdf
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608f68e0e316c---fefunalogenox.pdf
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a2e3f0b0b68---sonulagikoxaresuvovitep.pdf
    • http://shangrilayunnan.com/ckfinder/userfiles/files/93921490204.pdf
    • https://inverpalmas.com/aym_image/files/toduxewejizuvovalovejun.pdf
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/r01v95rbniciupjtnsvfmef9du/xaropalasewafu.pdf
    • https://mumegram.com/userfiles/file/nelol.pdf
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb86be7051---golesezudetuwemo.pdf
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/ul1he3hg361k27glk9g6lr2hg5/31337161837.pdf
    • http://nuestratierrapremios.com/campannas/file/dabejok.pdf
    • http://abpaluso.com/upload/file/19046606463.pdf
    • https://rijst.nu/userfiles/file/85133071549.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=telecharger+gratuitement+atlas+d%27anatomie+humaine+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000137cc.bin
0312cc0e13a690fa24861992d257ec578ca9ac8b5ec2aa1c42873db9c8e69461
pdf-font-stream PDF embedded font (sfnt) at offset 0x137CC 11164 bytes
font_01_sfnt_off0001518a.bin
5d6eb9550ace6958bab3becb34425fecb2d275d0cf10494ec3bb583f034b2190
pdf-font-stream PDF embedded font (sfnt) at offset 0x1518A 20784 bytes
font_02_sfnt_off000184eb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x184EB 16792 bytes