Malicious PDF — malware analysis report

Static analysis result for SHA-256 da7a25ad3a4ac2a4…

MALICIOUS

PDF

69.2 KB Created: 2021-09-01 21:36:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: ff8b8e7de53935648b1a29c40ec7a476 SHA-1: be47058a7b6557559c01f2f388f2eb0db10da93c SHA-256: da7a25ad3a4ac2a4bb9d101589b4e8386dca84292a46a1dce0de73fdf594cd81
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains an image-based decoy and numerous links pointing to external resources, suggesting an attempt to redirect users to malicious sites or download further payloads. The presence of multiple links on potentially compromised domains indicates a broad distribution effort.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://toppelletmachine.com/d/files/raletopati.pdf In PDF document text
    • https://webbsoil.com/home/webb/public_html/ckfinder/userfiles/files/fogurojolosa.pdfIn PDF document text
    • http://casier-a-bouteilles.fr/file/devisutazejuwegukagebumeg.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086bc98e36ed---zexedubulevemolabimadozib.pdfIn PDF document text
    • https://mytalk7.com/_UploadFile/Images/file/47918240698.pdfIn PDF document text
    • http://aucoindeshalles.fr/menu/file/15286207624.pdfIn PDF document text
    • https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/gl50eupgpc8fts52ijuvce88kl/mevisasetafexuvek.pdfIn PDF document text
    • http://arlingtonhigh1961.com/clients/e/ef/ef36f0800c0a5d5a0b00d5ecc8c3c6da/File/ratekuxodinakelav.pdfIn PDF document text
    • http://franzoesischebulldoggen.eu/userfiles/file/pexigurutabekiva.pdfIn PDF document text
    • https://kidneystonetreatment.in/userfiles/files/dajawedizubiz.pdfIn PDF document text
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b03c8978a67---kerataketasorenuvazes.pdfIn PDF document text
    • http://patokapugsnkisses.com/clients/61143/File/juxuvolitadezi.pdfIn PDF document text
    • http://e-park.es/img/uploads/files/46213766386.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/1635b4fff0aeefa3a42f336c4642117b/31473342038.pdfIn PDF document text
    • https://austdoorcaocap.com/upload/files/nebuloniz.pdfIn PDF document text
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1e72b7f8a3---darolupifulewevimuligu.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/2fbbe48c54dee304a06460999ac8484d/7482524200.pdfIn PDF document text
    • http://jujucuisine.com/userfiles/file/54751859122.pdfIn PDF document text
    • http://biirbeh.mn/images/content/file/17647033096.pdfIn PDF document text
    • http://musicupclose.com/clients/f/f7/f7c291dfb329fbc33054893077acf627/File/miligomiv.pdfIn PDF document text
    • http://sjar-tech.com/uploadfile/file///2021061220075369.pdfIn PDF document text
    • http://wjvanderheidedienstverlening.nl/uploads/file/fuwawebalagobim.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/0eecd95ff5c214afd3e4580d634b866c/74179893471.pdfIn PDF document text
    • https://atx-stroy.ru/wp-content/plugins/super-forms/uploads/php/files/f8321c68129198616f3b4eccf9aa9feb/98586389858.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=free+printable+algebra+worksheets+with+answersPDF 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_off0000b2f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2F2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cb04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB04 14364 bytes
SHA-256: 08fe7a4c2408f3582296536f4f56e061490adfff055c85d326e548be912378de
font_02_sfnt_off0000ee8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE8A 10828 bytes
SHA-256: bf8b113536ab352bd37dc6536a87233e349bee646986715f0d050dd1a12f565c