Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b81856a7d0db973…

MALICIOUS

PDF

214.5 KB Created: 2021-06-25 23:08:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7db654aee128f0ea47e7f0b033660d50 SHA-1: 5e2f1fc888adf3abc1f772d98d14fa6d0cd13342 SHA-256: 0b81856a7d0db97362e6e68273be0ed5ed28dab008c29b5d5502b54ab538161a
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains a link farm pointing to compromised WordPress upload storage, suggesting a phishing or redirection scheme. The embedded URLs are designed to lead users to potentially harmful content hosted on these compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9808

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.
  • 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://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/ro2mg48a43uf4ekrfnuubhiims/20058702308.pdf
    • https://maximatrimony.com/ckfinder/userfiles/files/66653588804.pdf
    • https://traonguoc.vn/wp-content/plugins/super-forms/uploads/php/files/5gjkd9ia963067vl9opf4s636o/tuvijuperorekomikokopux.pdf
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160735b4010435---rosaxapuwigibaminab.pdf
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/691f50f1ddb70174004cb9fe3fc18a76/35780860212.pdf
    • https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/752bb06bacf0252bb950770520ab072d/42637326064.pdf
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/4af4403d10ffe6219a695af189cc2aed/48742587571.pdf
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/ajr2sbmpdbgu6fi29q7hogoi6r/wolat.pdf
    • http://kashima.cc/userfiles/file/75888085276.pdf
    • http://alexforstarlight.com/clients/4/41/4125d763bdae894b2c088b8c4c0f4705/File/74792861043.pdf
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/e1177dc0cc77e10ee19d52739ffc2c3c/kidov.pdf
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b524b50928c---kagobevavifoko.pdf
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c72522dd0f---lovoruwubegimu.pdf
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/e69f194663f97f3c60f708406ef89931/seratufuti.pdf
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608f9d52d4dce---20101746660.pdf
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/929162f5bd6bcaf070688f756a455810/37663430563.pdf
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160769ea0e16e6---dasiremubewamifimog.pdf
    • https://alternatifhirdavat.com/upload/ckfinder/files/fuwusulobudaverupaviz.pdf
    • https://led7.ru/file/45297439827.pdf
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/16098a27a4d56f---16320559317.pdf
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16079ec2fc4592---fuvogikonerifipiwaruzakuj.pdf
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4713dc04b---98499681597.pdf
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/5f09e5742a31e3d47b133bf2b575013f/35837312197.pdf
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/67a0c7d7c6d42fcc625929e0ce074af5/64995845362.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=god+did+not+give+a+spirit+of+fear
    • 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_off0002d499.bin
05732b6600463a4157df43486bd84b719324378a16ac767f361cd43c18f9e334
pdf-font-stream PDF embedded font (sfnt) at offset 0x2D499 10732 bytes
font_01_sfnt_off0002ed39.bin
5b3bf7221f96e1538de427908cd7186e6810e008f85cd36ae0ceff92fb5dc2a1
pdf-font-stream PDF embedded font (sfnt) at offset 0x2ED39 34876 bytes
font_02_sfnt_off000333ad.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x333AD 16792 bytes