Malicious PDF — malware analysis report

Static analysis result for SHA-256 0865dbfa51dc18d8…

MALICIOUS

PDF

92.5 KB Created: 2021-08-08 00:41:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 350058bba0182778187fe8b0a4cce19a SHA-1: 79b1bcf4c29130c16de2900d9c57d348e5f989b1 SHA-256: 0865dbfa51dc18d8e21a420d8259965e6e0781556006d92bf7db55e860de74fc
164 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains a link farm pointing to numerous compromised WordPress sites, suggesting an attempt to host malicious content or redirect users to phishing pages. The presence of a 'download button' heuristic further supports a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078e9feaf000---30052571558.pdf In PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609634ba3bb79---samiwurilip.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/4b208209311bc7bac81c97d0c4760aeb/30339021737.pdfIn PDF document text
    • https://olamare.com/img/uploaded/file/5208961232.pdfIn PDF document text
    • http://gopherandsquirrelcontrol.com/admin/images/file/dumoma.pdfIn PDF document text
    • https://vishalahospitality.com/ckfinder/userfiles/files/totozafulaso.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/7146aa62ba1f284b8569f483bbcaada9/sasumenutokapixodaduw.pdfIn PDF document text
    • http://coffee33.ru/archive/file/15415522990.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0cb19324a9---woperuzesobetapav.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/591e371ac09f150141afb3ffa3ee5805/zopokopu.pdfIn PDF document text
    • http://www.zaluziemalina.cz/userfiles/file/susorunitumavisam.pdfIn PDF document text
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/ad9795c4f59c445ae910bf8f66022de5/28654778516.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/qqb4ekqklulrojkatdjcspi1rj/30412402779.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f14ed9bf6f3546e4673f8ea6b576e903/90836362050.pdfIn PDF document text
    • https://fzclicks.com/demo/files/editor/file/bijola.pdfIn PDF document text
    • http://ajivikafinance.com/userfiles/file/gubijiloxepikixazip.pdfIn PDF document text
    • https://ancoraeducacion.com/images/91944836924.pdfIn PDF document text
    • https://qian-ho.com/upfiles/editor/files/bubametet.pdfIn PDF document text
    • http://cukiernia-waltar.pl/qcms/userfiles/file/77715211582.pdfIn PDF document text
    • http://rhondachem.com/d/files/nukezuletogadiriwifef.pdfIn PDF document text
    • http://gewoongroen.eu/app/webroot/files/userfiles/files/64599504692.pdfIn PDF document text
    • https://edusfera.pl/upload/file/6866232320.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=the+hobbit+2+dual+audio+720p+download+khatrimazaPDF 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_off0000f8be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8BE 11220 bytes
SHA-256: 7e126ab6e528e2c330d23687aaf44496c818ad3e4c98dd84bb24c9a9981751f6
font_01_sfnt_off000112bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012acf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ACF 20772 bytes
SHA-256: c85ec30ac3a1a3d53484e14d0fe22e1aee4861f2bb7297580d57d05c5819ee7a

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