Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d45dda35a0bade4…

MALICIOUS

PDF

85.4 KB Created: 2021-07-01 16:31:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 52a9d7a242ad1fe29620da2b86c3e3ad SHA-1: eb150f094f86d7217b8afed79eb0b52eced0d95d SHA-256: 0d45dda35a0bade486dbca6a9b3623e8523ae215bebb97ec2f537f33f0918e76
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress upload storage and disposable hosting, suggesting it's designed to redirect users to malicious sites. The document body is heavily obfuscated, preventing analysis of its specific content, but the overall structure and URL findings strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://anthonyvienna.com/sites/default/files/file/dezirasowazufen.pdf In PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607189f003031---wodeturuj.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/9ef58bbe8c57b5483f7865b23963b347/19919212072.pdfIn PDF document text
    • http://championshipsportsrings.com/clients/23492/File/sajagudewizarezepef.pdfIn PDF document text
    • http://beta-rc.com/upload/files/79284679090.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/1c2ce8173db2d69d0931cd65c3e9553e/xovurisagorimew.pdfIn PDF document text
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/19d57e517de4bd1778b8dca89d2eb48c/zurusuzuvibageruk.pdfIn PDF document text
    • http://abaj.cz/UserFiles/File/rofuzoligumafut.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/ca45lg3n7q064pot4g80d6h0lh/lajot.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096cdedeb3e6---nosepibebenikuveburomaja.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9e2cabe903---kikivipabi.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b823e60b21b---kilakifoko.pdfIn PDF document text
    • http://studiofapas.it/userfiles/files/80549561090.pdfIn PDF document text
    • http://meyanko.com/userfiles/file///95463698556.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/8bf2936768c0f36bce14d29fa4830186/bigokonizatow.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f73b89eba7---34559339632.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/fb53995041d3bddc3b96216af60d8c0c/mulosebo.pdfIn PDF document text
    • http://oasis-inwaste.asia/files/file/fonisidimaj.pdfIn PDF document text
    • https://nhachoxebus.com/upload/fck/file/54988597693.pdfIn PDF document text
    • https://hophamthaibinh.com/upload/files/71133114284.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/nrm1num3jigmncedcnrqae62m1/10080038463.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090ea520c4ec---mogiwudozawata.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/j55uljubilfm5to7s2c1bdjkv0/ribamejebafewajodive.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/llbph9unl9qrkovj7i1lq7fljk/wekarosevozixetewobus.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=law+of+motion+law+of+inertiaPDF 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://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_off0000eaf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF9 10252 bytes
SHA-256: 2353177971227f0ed884dcf32722c15badcbb61e2dcc6023b28dcb8c6dfb0b31
font_01_sfnt_off000101fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101FD 17720 bytes
SHA-256: bd39fea3e0fd3373c3473d2e39508e0327fdd55d4365deefdaf5b5780cf7c135
font_02_sfnt_off00013044.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13044 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1