Malicious PDF — malware analysis report

Static analysis result for SHA-256 babeab2fcd40ddcf…

MALICIOUS

PDF

83.4 KB Created: 2021-07-08 07:07:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 9a6e96f3fcb539888e96cb37654aef9d SHA-1: 3292d61de1f717a651b0aea13d212066532607a0 SHA-256: babeab2fcd40ddcfd0b061889a96978c076d4b97c7ae23f00adcfa314cc3003b
96 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress sites, indicating a tactic to distribute malicious content or manipulate search engine results. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent. No scripts were extracted, and the document body was unreadable, so the primary attack vector appears to be the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 5

  • 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.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5d0ece0a4---nefaxe.pdf In PDF document text
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1608aada3ac4a8---84725877195.pdfIn PDF document text
    • https://nullemont.fr/nullemont/ckfinder/userfiles/files/11502246288.pdfIn PDF document text
    • https://termoformat.md/img/files/luwamisifot.pdfIn PDF document text
    • http://olsztyntransportmedyczny.pl/userfiles/file/19938172144.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/6f38d9196d6d8a9111b9156ca6d0a4f0/94301870421.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160905e6e46c4d---34858626633.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a1c26a2cd4---fodugebukuvi.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/5d405779eaaef19cfce74c9aab6072a3/7639850145.pdfIn PDF document text
    • http://kahounova.cz/userfiles/file/13370423801.pdfIn PDF document text
    • http://tscyw.net/userfiles/file/20210622194800_o71k0g.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a035c6ae5d4---89327220907.pdfIn PDF document text
    • https://jmtours.co/aym_image/files/delovupataxazuwe.pdfIn PDF document text
    • https://acgroupenterprise.com/userfiles/file/zodurixumabupusegapewir.pdfIn PDF document text
    • http://tlumacz-lipno.pl/pdrzewiecki/files/13933742715.pdfIn PDF document text
    • https://ancoraeducacion.com/images/zajik.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/f5f03456e757e8fa70c2509d3c58c7fd/47079679106.pdfIn PDF document text
    • https://pirkitpadangas.lt/ckfinder/userfiles/files/10497115948.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/6be4381a61459fb1b63830e857d854ea/76437287446.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/cq3inppc97egm6pakl7ratfq03/7099782655.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e2e17132c9---1484733954.pdfIn PDF document text
    • https://cordovajewelry.com/images/file/23257867900.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/42fb87c9cf28dd3789f82f9231c50469/25501955238.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/is1ikdqtuk9vqunv7djcbmia47/63990973696.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=meaning+of+catnapPDF 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_off0000defd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEFD 10332 bytes
SHA-256: e6bee5ba5adea83444940d89ffc9db7647444776d7edf9767676e7fc5fc1a548
font_01_sfnt_off0000f66f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF66F 18948 bytes
SHA-256: bdc5d3198e0f8b2d946b67fc67b5a1a9f20b14f1878bdf17c212e22af6e3e81d
font_02_sfnt_off000128af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128AF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1