Malicious PDF — malware analysis report

Static analysis result for SHA-256 fad31704ce574d6d…

MALICIOUS

PDF

288.5 KB Created: 2021-07-07 10:11:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: e469757fe3f7307364cb2059f1485f33 SHA-1: 697b0e840abb635c0b1f8f497e41dc733f27dcaf SHA-256: fad31704ce574d6d17bc9e4e952ebf5adcf2fa8520950ede9f179d192c9b9138
206 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to external resources, with one heuristic specifically identifying a link farm pointing to compromised WordPress upload storage. The 'SE_BROWSER_INSTALL_LURE' heuristic indicates the document's content is designed to trick users into installing browser extensions or updates. While no scripts were explicitly extracted, the presence of external links and the social engineering lure suggest a phishing or malware delivery attempt, likely involving a second-stage download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9770

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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 http://doublehappyvstheinfinitesadness.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b09119bb0f0---11281248683.pdf In PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae83df9d72f---tejag.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/h0q7p21ecj24268o2pp5eqqdub/3215476223.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/996ab986d74de79df508ca0484d3b3f0/detonebegunapaje.pdfIn PDF document text
    • http://resetimpianti.it/reset/public/file/buzojasip.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a643a16c9c---detifobewoba.pdfIn PDF document text
    • https://fundreamz.com/ckfinder/userfiles/files/3379050400.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16075df628ab1a---subitapi.pdfIn PDF document text
    • http://fantasymusic.it/userfiles/files/94811967336.pdfIn PDF document text
    • https://bawaniint.com/ckfinder/userfiles/files/juvadodanuvafigoti.pdfIn PDF document text
    • https://encoregallery.us/wp-content/plugins/super-forms/uploads/php/files/f1989fc1033ed57e9cfc14e11834f161/55171234718.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b91c307ca41---mugorenegemetabirume.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/lhbqlrnk6teu90ufb1ij1hs0js/vabibiminux.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/89ba6068bab11b64da38220f71aea559/61399766198.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/42471788821.pdfIn PDF document text
    • http://sibleyestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/40699224775.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/njr7hf2afgdrdu94a5te0rop0j/zoxurizanufajadiwigog.pdfIn PDF document text
    • http://kalikraft.com/images/file/wuzelijifusuvudaxa.pdfIn PDF document text
    • https://studio-september.com/wp-content/plugins/super-forms/uploads/php/files/dc68622369c73621702171ab0e526f1f/sutalijubuxelebamumewixux.pdfIn PDF document text
    • https://brandonsmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/pt4j6leborb8q42vs3lc186425/58325830854.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160888691e9b65---69353925203.pdfIn PDF document text
    • http://oakgroveschoolheritage.com/clients/b/bc/bc5c94904a1f00f1300372e6f875146f/File/70612823476.pdfIn PDF document text
    • http://kirilmazbardak.com/userfiles/file/lalosidabikipana.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160890d5873af8---zomubupezuvavuberod.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160924337132c0---31408351045.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/kawolodumi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=manually+update+woocommercePDF 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_off000410e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x410E5 18628 bytes
SHA-256: 1dbcfa5a5ff0764c798adda7e411af4622f2fcf100e0e1482b69a45788fa07b1
font_01_sfnt_off00044272.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x44272 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00045a89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x45A89 10708 bytes
SHA-256: 2d2bdf3d1f6c3349843b25fce3a2246fb7bedeb3f07079b060e95549e28c52d3

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