Malicious PDF — malware analysis report

Static analysis result for SHA-256 2aab7ee2a5114387…

MALICIOUS

PDF

91.9 KB Created: 2021-06-29 10:03:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 564f82953d676d329fc9f78cdb03a00b SHA-1: 059bee28e918e28f385a1b25f595c96a48180671 SHA-256: 2aab7ee2a511438715bd96c4bda5d3c279b673a40d0a92ebfb32529ddb9251f0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs pointing to compromised CMS upload storage, indicating a link farm designed to host or redirect to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure of the PDF and the nature of the URLs point towards a phishing or credential harvesting attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9786

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 https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb780aaa7c---45726997919.pdf
    • http://pogotowienaukowe.com/Upload/file/tawufijux.pdf
    • https://n-zvuk.ru/upload/file/5285837275.pdf
    • http://np-laser.com/upload_fck/file/2021-6-26/20210626030836132497.pdf
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9caefc6ff2---teminirisuronowefo.pdf
    • http://xn--80aatg4aaaddkhfhbf3evf.xn--p1ai/ckfinder/userfiles/files/vemowogedakunofiver.pdf
    • http://mspchicagolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/46646979913.pdf
    • http://ctyrkolky-gamax.cz/data/dokumenty/92661399343.pdf
    • http://chsbicentennialclassof1976.com/clients/c/c2/c283bfa2537a82fb79a670aa087b4bd4/File/zuzipavori.pdf
    • http://diysmart.net/userfiles/file/sikapunutofarojabib.pdf
    • http://yaqeen-eg.com/userfiles/file/joxugovakubabudujizotajat.pdf
    • http://schmetterlingsgaerten.de/file/98071040508.pdf
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1609d9ba0dd145---zonetuxadifewuvemamu.pdf
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/9768d0f4872f7183eaa06ec0d203e4a5/9157048381.pdf
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/668b43ee5fc8939b173ed0ad12c50af7/90880809533.pdf
    • https://wagaskar.com/media/nalonoda.pdf
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609065e459009---36583208903.pdf
    • http://shqinze.net/admin/upimg/file///zulepob.pdf
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/h46nhslk3bevub43c5u1b41n0m/17174843392.pdf
    • http://alexlunacoach.com/img/editor/file/zepuzosakinekori.pdf
    • http://cityclick.it/userfiles/files/85422832595.pdf
    • http://pnmanagementsolutions.in/uploads/jibukuxadezosarepurobaxi.pdf
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/63c885dca781514f66edeb55143e4804/pikoxosipas.pdf
    • https://sfeerweter.nl/userfiles/files/raxekuj.pdf
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607673ee36003---8838641429.pdf
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160928cc4dc971---62252474331.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=spiced+hot+toddy
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee00.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE00 16792 bytes
font_01_sfnt_off00010617.bin
73019af89bcf459ef993334099acda97b84c281c6ef0edab1baeacaa343ce82e
pdf-font-stream PDF embedded font (sfnt) at offset 0x10617 10220 bytes
font_02_sfnt_off00011d32.bin
9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd
pdf-font-stream PDF embedded font (sfnt) at offset 0x11D32 16092 bytes
font_03_sfnt_off00013273.bin
17905928456bac5c034a9aa6bc21d732599bb69e5d543d3ea121421858a6244c
pdf-font-stream PDF embedded font (sfnt) at offset 0x13273 17700 bytes