Malicious PDF — malware analysis report

Static analysis result for SHA-256 aaecf0b0cdebf967…

MALICIOUS

PDF

79.4 KB Created: 2021-07-02 11:42:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 78ffc2d153c5e7e9ff575adf40aa7e5a SHA-1: 3c0a552da82a8e3c69253f74e0c5aadb455def6f SHA-256: aaecf0b0cdebf967bb57febcea2725f4624c92370b30c7694ca0ef00d8808646
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links pointing to various compromised WordPress sites, many of which host similar PDF files. This structure is indicative of a link farm designed to distribute malicious content or facilitate phishing. The ClamAV detection and ML classifier further support its malicious nature. No scripts were extracted, but the PDF structure itself suggests a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/12bnbl0e1ba48q2u8khq62mj96/tumotibuw.pdf In PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160910f5f1792a---58807945843.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbf95d55c1c---limavefu.pdfIn PDF document text
    • http://sotel-perm.ru/site/file/julujosotule.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609195a261e19---35378236625.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160adca5f7cea2---xubosokenefebaru.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/tuferutitib.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/c078ba934d0abdbf306f28a915d91b7d/34457905711.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/b241502da2521d8fb8dbfa8f76ea22ab/16172534950.pdfIn PDF document text
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/7acfda9dc415185800e8ad876b5feb34/9735754013.pdfIn PDF document text
    • http://nuestratierrapremios.com/campannas/file/mireveladisafafepawiwam.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a224555ad6---relezorakepasipexaxore.pdfIn PDF document text
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160724bcbc3f24---setobetusipizuxara.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/oo7unmskrat5mrh5hbegtra3n1/89253268245.pdfIn PDF document text
    • http://webursitet.org/Files/file/5089913805.pdfIn PDF document text
    • http://travelshops.pl/userfiles/file/xusunizum.pdfIn PDF document text
    • http://emke.hu/uploads/ckfinder/userfiles/files/99114924450.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/68c7c90b757b949ddf470639988a6144/xanalanaw.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/97736f726c39223120bbd5bf4e557dae/mugakoditibajojawerize.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/ag9fi9rffaicl5j6p9cu4orsjp/ponogesititopalam.pdfIn PDF document text
    • http://oakgroveschoolheritage.com/clients/b/bc/bc5c94904a1f00f1300372e6f875146f/File/kimodol.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/11672738629.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/in1ei9j5vuuheocbq14fvk0li0/divababubivome.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=campbell+county+assessor+property+searchPDF 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_off0000cdef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDEF 17904 bytes
SHA-256: 5931b99c85f59f79eeee2266484c40775a5d61b81efa790a10589ff0b934939a
font_01_sfnt_off0000fd67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD67 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001157e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1157E 10932 bytes
SHA-256: 974cda57a6614e5204c4592b4dcf652c2b34a3160052a51bb625a9909d1258d6

Open this report in the interactive analyzer, or submit your own file for analysis.