Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2362201b43aa97f…

MALICIOUS

PDF

82.6 KB Created: 2021-07-02 22:59:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 305709739774c52220251283d3904c67 SHA-1: 7846e9c22fdcc0f9aebcf9f6ac11c92d9579575d SHA-256: b2362201b43aa97fc183cecace9ddae3a4d02fae131f94d443be4817550ac980
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious content or phish users. The document body is heavily obfuscated and unreadable, providing no direct user-facing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcc65777cd0---54877445085.pdf
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4b21c5e2d6cda55526f5d9a6207e8183/26974591697.pdf
    • https://kompaspt1.com/contents//files/32905371172.pdf
    • http://saharun.org/uploads/ckfinder/userfiles/files/96231983309.pdf
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607589068976f---15120677518.pdf
    • https://theelementrama9.com/userfiles/files/vipejusuv.pdf
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/89c340aaac0a0bb47fa44cfa15d386e9/sakorajolotekivu.pdf
    • https://chambres-hotes-aube-bleue.fr/userfiles/file/22989677472.pdf
    • https://twr1115.net/files/fckeditor/file/jubijomigopobasibodulozab.pdf
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/62a65cc15f720bd9a59c099dbfc13d74/67444919306.pdf
    • http://kolaykanal.com/userfiles/files/dexat.pdf
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/outlvu4fumrdqohnum4a9io2pv/72593626034.pdf
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a881d678f35---kativuxixuxobiwa.pdf
    • https://traonguoc.vn/wp-content/plugins/super-forms/uploads/php/files/gofpbvleb63kb4j0r9vbehjf4r/23348861399.pdf
    • http://tysons-cafe.com/uploads/files/16330942411.pdf
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fe60d436b1---nemosirawumamojunebejinix.pdf
    • http://hosungtour.com/FileData/ckfinder/files/20210526_09470C5C8B40CDDF.pdf
    • https://stegopackaging.com/wp-content/plugins/super-forms/uploads/php/files/mpsc8a19443n5n3k99pmohud8p/11059213798.pdf
    • https://store-connector.com/_upload_bilder/_filemanager/file/donimekananugamopu.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=numb+toes+ms
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e441.bin
3b3a3a22df00b663c6defd17095b4008cd62158a4089b693b9a5f7333cef3e2b
pdf-font-stream PDF embedded font (sfnt) at offset 0xE441 16840 bytes
font_01_sfnt_off00010f94.bin
d18b19052863bdd6c613f3270da48bd8a9ac4e4fad9dd1356d2ad56c32276921
pdf-font-stream PDF embedded font (sfnt) at offset 0x10F94 9984 bytes
font_02_sfnt_off000125d0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x125D0 16792 bytes