Malicious PDF — malware analysis report

Static analysis result for SHA-256 52e5611b9e50bdad…

MALICIOUS

PDF

79.8 KB Created: 2021-07-07 05:42:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 99c24268c5dc2efb622effa307ff2c6c SHA-1: 118ed95488f996979e99bbf83a74e1e53d8aa779 SHA-256: 52e5611b9e50bdadb5eff02fd5a5bb6a6ec21fcfe79885775af27919b6eb842c
124 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV, specifically as a phishing trojan. Static analysis reveals it functions as a link farm, with numerous embedded URLs pointing to various websites. Several of these URLs are hosted on compromised WordPress upload directories, indicating a potential distribution point for malicious content or phishing lures.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4650

Heuristics 5

  • 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
  • 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://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/899741a7579a7b6f511a1b59d5108599/19405707564.pdf In PDF document text
    • http://www.mediagrand.hu//data/editorfile/rigujirilekemopowutikaji.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a3a1e262ad8---gogupojizopadu.pdfIn PDF document text
    • http://skncn.com/u/files/62737034711.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607caff941a17---femoxaxapinadilot.pdfIn PDF document text
    • https://acronimocostanzo.com/userfiles/file/torodonegorajogikila.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608111e650622---19291484621.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160713c61a2940---80764193282.pdfIn PDF document text
    • https://thehideawayresortpattaya.com/userfiles/files/galebixotexipaxuwutewuri.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/160c1d14052ab1---44782474343.pdfIn PDF document text
    • http://jiendurancecoaching.com/ckfinder/userfiles/files/rokiwojazixapawapib.pdfIn PDF document text
    • http://mp-hd.de/data/aktualnosci_imgs/file/57976620459.pdfIn PDF document text
    • http://royalwedding.jp/images/blog//file/47824092661.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/16081eea6b0542---nefoxusoripadafovepog.pdfIn PDF document text
    • http://tragiaocolamsapa.com/userfiles/image/file/79385963228.pdfIn PDF document text
    • http://harryreichert.de/uploaded_pics/News/file/99158935681.pdfIn PDF document text
    • http://szyldkj.com/luodan/images/userfiles/file/30122460624.pdfIn PDF document text
    • http://donghobaoan.com/uploads/files/23597482715.pdfIn PDF document text
    • http://xn----gtbercbfedtm3b.xn--p1ai/admin/ckfinder/userfiles/files/niwomadalogowavadaxitav.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210618004735148.pdfIn PDF document text
    • http://xiangzhuan.tw/upload/files/70595692960.pdfIn PDF document text
    • https://tonwen.org/userfiles/file/66172832528.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/52253a97f5d2e8e38f290e2246e5ecc5/95872383207.pdfIn PDF document text
    • http://wfhs64coyotes.com/clients/b/bb/bbaa54d3a7800b2058c5658261a6771d/File/90159077052.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ac213a18e25---53799770879.pdfIn PDF document text
    • http://artospace.com/pics/file/rixubap.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=ballad+of+you+and+iPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011b4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B4D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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