Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5571bea2cced682…

MALICIOUS

PDF

317.4 KB Created: 2021-06-30 10:12:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b332066c998a619140c5cbc1077fb5af SHA-1: b2f2a39091c8dc0d52c4e7bdd2d5fbd5f44ddd76 SHA-256: b5571bea2cced682f0c3c77df283286334889b96ec46a014b359ef2af122847e
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple links to compromised WordPress upload storage, indicating an attempt to deliver a malicious payload. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly suggests the document's content is designed as a lure for advance-fee fraud. The embedded JavaScript likely facilitates the download and execution of a second-stage malicious file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9753

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/27c78f470285b0413a3086a3797b31d4/49021501426.pdf
    • http://sweden2020reunion.com/clients/e/e2/e2375cbe45a1e08e95d3a39ca41e84e3/File/bujemotatu.pdf
    • http://shipagents.nl/uploadfiles/file/kumimajisi.pdf
    • http://eko-inwest.eu/upload/file/pevudorov.pdf
    • https://oversaslogistica.it/file/koxugazumipijaroluwep.pdf
    • http://cokhiminhhien.com/media/ftp/file/vafafazosotumem.pdf
    • http://nedirajtebosnu.net/userfiles/file/26203155034.pdf
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b0b7617dd9c---62117276398.pdf
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16078e259b9a21---90770090297.pdf
    • http://thehigh86.com/clients/13680/File/vunumanoratol.pdf
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a209252e75a---dipataxawun.pdf
    • https://alatheir.com/atheirwsfiles/file/17044403884.pdf
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4a7e479f9---10201504802.pdf
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a17c2bdbd0f---dividuforomejewisumizaraf.pdf
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a92b3804f8c---4919914021.pdf
    • http://mundori.com/js/ckfinder/userfiles/files/64066805425.pdf
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160855b2e6d755---xaletulimiworuvolexupe.pdf
    • http://symbioticlifetech.org/attfile/fckimg/file///20210622215852_250894447.pdf
    • http://hayatteknoloji.com/webimage/file/fatepilukam.pdf
    • http://bafiti.com/sklep/userfiles/file/35032957126.pdf
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3336da8bf---22153786061.pdf
    • http://polskienarty.pl/data/aktualnosci_imgs/file/rewufesalabug.pdf
    • http://alhouti.com/userfiles/file/pinevizujovat.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=application+of+ratio+and+proportion+in+real+life
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00045cc8.bin
42cf6a92b96a8907bd5652c6bad2ca8ead6b02337728a14381eaced0fb0fb0f1
pdf-font-stream PDF embedded font (sfnt) at offset 0x45CC8 3676 bytes
font_01_sfnt_off00046ba2.bin
358ae6bbc78c540e583de0537153be98ff4569fd0024db6d645cdf80201bfcff
pdf-font-stream PDF embedded font (sfnt) at offset 0x46BA2 32128 bytes
font_02_sfnt_off0004b67b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x4B67B 16792 bytes
font_03_sfnt_off0004ce92.bin
9f5eabbc4086a43908976b1e7d5e9f263f78da99a1448b8f8a37fc7fe78faddf
pdf-font-stream PDF embedded font (sfnt) at offset 0x4CE92 10424 bytes