Malicious PDF — malware analysis report

Static analysis result for SHA-256 56b60a96dc97ed7c…

MALICIOUS

PDF

79.2 KB Created: 2021-05-30 06:21:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 3cf8d897ba58eff9f98767e5324aefe8 SHA-1: 27d501a1548c2241fd4640e98f3d86c4659b34f4 SHA-256: 56b60a96dc97ed7c99ac137374766d7fa9b4bf5c4b45b8aade3d9eadcbad39ce
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a link farm or phishing lure. The document body, though heavily corrupted, contains text related to game achievements, likely a pretext to entice users to click on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c49ffc883b---guvujukuzo.pdf In PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a47e84f3d54---376061150.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/j624anf52p78o6uuokdj029967/38940449848.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/6796d63e8429beb5e3b502a7f1f9780e/63670102881.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e688d4cd0c---sojisuwuzijijufej.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/grrr1172er7ntbo9fntkg490s1/15333207502.pdfIn PDF document text
    • https://pima-alarms.rs/slicice/file/80171738613.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/487c45dddb8efa211cfaaa7cd1e6f59b/muguxoxid.pdfIn PDF document text
    • http://cloverpark1959.com/clients/51168/File/89489123019.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/mq1g9at5c45afh2j5id7a00l62/gokirezafinumezasebato.pdfIn PDF document text
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/de5e5d13f299f53a0677d4a789d626a8/35107533094.pdfIn PDF document text
    • https://prairieroseclothiers.com/FCKeditor/file/823387708.pdfIn PDF document text
    • https://landbondcorten.com/attachment/file/42b31b6385caabb2d84d1c161b939809.pdfIn PDF document text
    • http://gyobel.itpublic/file/lofoxujoxigojevegone.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/gjfedv7d0mch58cgku0s57rcgf/86355534516.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/labajodipawaj.pdfIn PDF document text
    • http://opalsolar.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607faebe30368---16214481550.pdfIn PDF document text
    • http://bostonmentors.com/userfiles/file/39194109465.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608423fa86d3c---dolufupinoxiragavoparu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=how+to+get+the+secret+medals+in+infiltrating+the+airshipPDF 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://scripts.sil.org/OFLIn 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_off0000e0f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0F8 5624 bytes
SHA-256: 3e332386ada599ee557b4dfdfe558d28baf2dd739d0dfe812e9e489a074979b9
font_01_sfnt_off0000f404.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF404 10784 bytes
SHA-256: 3c80a9b1985720d5e23d5b7c55d9e3c4523a7ed62aa0582d3325eb5315c38e2d
font_02_sfnt_off00011802.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11802 16196 bytes
SHA-256: 8f0e4cc40e189f844ba505870c5743bf61ee9cdf6cb8b14e370866b3c0b868e2

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