Malicious PDF — malware analysis report

Static analysis result for SHA-256 53408e814282150d…

MALICIOUS

PDF

73.8 KB Created: 2021-07-15 18:57:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8778522959ec1983be39f33bab5c72c7 SHA-1: f2c6076f580f229f02262d5e1af66bd76b75555b SHA-256: 53408e814282150d43a536d8a0777249fb06ef7f2e0e11c8e5c55afa5defd031
164 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised or disposable hosting, suggesting an attempt to distribute malicious files. The presence of a download button lure further supports a phishing or social engineering attack. ClamAV detection and ML classification confirm the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ibtaker.ps/userfiles/file/47803505003.pdf
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160ba667a693bb---94379723567.pdf
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/dc8jltjfaf2t7d1nisba1v1pl2/86401809355.pdf
    • https://makanbanyak.net/contents//files/valusovulajevonazivubo.pdf
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160867b7266c43---61875109489.pdf
    • https://alakharia.com/public_html/userfiles/file/84169783592.pdf
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/u1b68prauhgtsro6m2nokof5j1/7946043411.pdf
    • http://accessiblevehicleservices.com/userfiles/file/33733383868.pdf
    • http://decamiones.com/userfiles/file/fezozu.pdf
    • http://fitviewer.de/files/file/jibex.pdf
    • https://theelementrama9.com/userfiles/files/togem.pdf
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160c9560fb4124---88494599453.pdf
    • https://fleuriste79.fr/ckfinder/userfiles/files/sametarasa.pdf
    • https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/0f0fe61e344229a7a4e6e62d989db2d7/51615013546.pdf
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bec87880492---71092001160.pdf
    • http://aryajob.com/user_upload/file/jaxuxovaropuwovux.pdf
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b404d97d7a9---94315736187.pdf
    • https://ottenburger.com/userfiles/file/letonudokafikosegatafaba.pdf
    • http://megalaserasia.com/upload///5145023105.pdf
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdd95721b8f---rexevoma.pdf
    • http://iphysiology.ru/upload/buxegavutenore.pdf
    • http://bienbao.net/uploads/files/53354047243.pdf
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a89305ada0b---gixileneli.pdf
    • https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/69a790e119f1cb5dd1eaa8c89c8ad0e1/kazukiwizulozibodi.pdf
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dca35f795a4---79301671045.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=pachai+kiligal+song+download
    • 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_off0000bf3e.bin
912a5e9541c393e2cbc69839d444ff9d772cbcb1f18b1c152b7a21a67d509524
pdf-font-stream PDF embedded font (sfnt) at offset 0xBF3E 10496 bytes
font_01_sfnt_off0000d6d7.bin
70b9447c8c0fcc25d6994521e018ae1b8cfa9d07fe6e4c5039d73d559780343c
pdf-font-stream PDF embedded font (sfnt) at offset 0xD6D7 16568 bytes
font_02_sfnt_off000101e2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x101E2 16792 bytes