Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c12c5d142b2fad8…

MALICIOUS

PDF

85.1 KB Created: 2021-09-01 12:07:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 33089d1a67559b020e8fbccc134d1b67 SHA-1: 67aa30750c909fe2d67bce9c12ed219474861482 SHA-256: 3c12c5d142b2fad88021fabd235a1b6a27508ab3f58be22132bcf1b93c04d28e
136 Risk Score

Malware Insights

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

This PDF document is classified as malicious, exhibiting characteristics of a payment redirection lure. It contains numerous links pointing to compromised WordPress sites, likely serving as a link farm to host malicious PDFs. The document's structure and the presence of embedded URLs suggest an attempt to trick the user into downloading a file that could lead to financial fraud or further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 6

  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c4b79d387c9---14358665327.pdf In PDF document text
    • http://retailpark.bg/uploads/wysiwyg/files/kolelotafukewo.pdfIn PDF document text
    • http://thehigh86.com/clients/13680/File/wufazejok.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073f722d251e---48929209418.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ffe3985ef7---lobupoxogopov.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/14713dfb81013ff228b87b6bfc1a1d88/70556693805.pdfIn PDF document text
    • https://lasanisports.com/files/77653077316.pdfIn PDF document text
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/b474e4e7685f4e9ce665ee06e4de6ebf/14072104638.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/c2haqqbsu01ior87n4ut6oompm/63388530683.pdfIn PDF document text
    • https://lensprovn.com/ckfinder/userfiles/files/39281147153.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607f84611388b---vafidumar.pdfIn PDF document text
    • http://jedwines.com/cmsCart//upload/file/88173792549.pdfIn PDF document text
    • http://dongshengcable.com/images/upload/File/rowopipefifake.pdfIn PDF document text
    • http://www.ettermanenterprises.com/ckfinder/userfiles/files/91221790174.pdfIn PDF document text
    • http://richardchong.com/userfiles/files/19720992079.pdfIn PDF document text
    • https://blsautomation.com/ckfinder/userfiles/files/24927140477.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/087da9709ad34743b475a12a252d34d3/95735915759.pdfIn PDF document text
    • http://notariocprietoa.com/notaria/documentos/files/59464954509.pdfIn PDF document text
    • http://psystems.gr/Administrator/uploads/userpics/OutPostImages/files/79093638124.pdfIn PDF document text
    • http://better-pharma.com/images/file/files/84438536184.pdfIn PDF document text
    • http://kosmonautika.ee/ckfinder/userfiles/files/sixapolutu.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ec252c8a10---65625954.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab66ca344ab---muxumelem.pdfIn PDF document text
    • http://uralcomservis.ru/crn_fls/crn_files/vazawidakinar.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=on+account+in+accountingPDF 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_off0000e8e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E5 18084 bytes
SHA-256: 503288cfe13cefabbfea153c3498bb064e02ccb6b318d7869d73005ee6740ac6
font_01_sfnt_off0001174e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1174E 10084 bytes
SHA-256: 0fb41a9bf107be97474e4b1c8734ad9a00ca8194784adcbf800558e1e48197ad
font_02_sfnt_off00012df6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DF6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1