Malicious PDF — malware analysis report

Static analysis result for SHA-256 703c82d94b14d03a…

MALICIOUS

PDF

88.0 KB Created: 2021-06-27 20:34:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: ffde79bf1efb87b135d35d848c403b36 SHA-1: fe0f56a1aa08daec08bbd8a09c72025b0109b16a SHA-256: 703c82d94b14d03ad0de5deb35252a30a83533317691f1a37323f9bcb828c012
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs that point to compromised websites and disposable domains, indicating a link farm designed to lure users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://tragiaocolamsapa.com/userfiles/image/file/18887954512.pdf In PDF document text
    • https://craftsmancuttingdies.com/wp-content/plugins/super-forms/uploads/php/files/ttga8ttnoa9aguu2aq8cm9rgvl/bupumadazojavixekupib.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/ac91e406fa31e44c798e8b2fbc29d36c/dawuvakagoborunam.pdfIn PDF document text
    • http://baloneacessorios.com/_upload/file///worefewuzusuwixovupesit.pdfIn PDF document text
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aab5ffb67ef---rabufesikani.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/10168uddnhscie05hoj1q5s2e3/xurakanaloju.pdfIn PDF document text
    • http://franzoesischebulldoggen.eu/userfiles/file/34750809293.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/328fd005924528af3cc8c940fa340666/rozinizivuwosuwozibugilu.pdfIn PDF document text
    • http://frezerovka.by/images/fxeditor/file/pozotakowemonedifozomemol.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608f7b7773412---mixiwof.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/b82c3a92c388bdb8f83f9873fd7573ed/wikage.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/l8m95pj9ld8u2vf6nvpqtgaet3/57705979472.pdfIn PDF document text
    • http://txextremecarts.com/userfiles/file/rugafevuxiluzamolifa.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8538fd7589---73945593810.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079b33dbef61---53096661165.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/d252e12b7d89a23a41e146a3a1a92215/51135297970.pdfIn PDF document text
    • https://ehlibeytalimleri.com/resimler/files/23241737599.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c665d354d24---puvedovop.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d63784f775---gegalogukanaj.pdfIn PDF document text
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/1759ed42b1d80e7a8d58293f606f1e49/rojimarujomobudakez.pdfIn PDF document text
    • https://dovolena-jiznicechy.cz/uploads/jekinefulinenum.pdfIn PDF document text
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/d70ceed5c9b1845d3ec7138f8cbc976f/75899678535.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160940ad24e552---vamun.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/af8e4f4dc6833f8a9564aeafe196a5aa/21554591201.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=discussion+text+and+generic+structurePDF 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_off0000f524.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF524 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010d36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D36 16552 bytes
SHA-256: f4a73903c27935ce07f3f1b0bcaf6265140542186d4a5aa3eca937e50febaaa4
font_02_sfnt_off00013838.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13838 10704 bytes
SHA-256: f1ad9f9e3ca8d5ddd2a2c6e05d79b84c63f39bcb1a84188fcc9465d01cd8b5c3