Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc3e0ba1f3f6495f…

MALICIOUS

PDF

85.3 KB Created: 2021-09-09 06:48:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 80a6033adc508cd43705c92e75eed3f5 SHA-1: e0020d8dde3597da7ccbcb5a9c5adcdb64172d17 SHA-256: cc3e0ba1f3f6495fa88219c414ec609c4a1852972dfe8bc5c87bef99a7f3c887
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document that contains numerous links to external resources, many of which point to compromised WordPress sites and disposable hosting. The primary heuristic firings indicate a link farm designed to distribute malicious PDF files, such as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0' detected by ClamAV. The document's structure and embedded URLs suggest an attempt to trick users into downloading further malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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.
  • 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 https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132e0bd71a77---9021667600.pdf In PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/1f8c70bbd668b99c38fb057c6b252904/bilaniteg.pdfIn PDF document text
    • https://gospel-streams.com/asset/ckfinder/userfiles/files/nezam.pdfIn PDF document text
    • http://khmim.com/ckfinder/userfiles/files/93385447842.pdfIn PDF document text
    • http://flomojapan.com/upload/files/92514379022.pdfIn PDF document text
    • https://robustbrakes.com/administrator/imagetemp/file/13910703690.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1612f6d095360a---72165337184.pdfIn PDF document text
    • http://xn--80aesyq.xn--p1acf/files/file/wiloratolepa.pdfIn PDF document text
    • http://kubak-ubezpieczenia.pl/userfiles/file/tobifekesudawuxiv.pdfIn PDF document text
    • https://servauto.fr/img/user/file/zibamu.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613019b3382c4---2685046150.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/161394ef753e84---76623659953.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/161390a9ac7652---gejil.pdfIn PDF document text
    • https://ambulatorioveterinariosismondi.eu/file/zukegevutaze.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613967ed042bb---51716195191.pdfIn PDF document text
    • http://businessdevelopmentcenter.pl/uploads/userfiles/files/94826905156.pdfIn PDF document text
    • http://stefanourso.com/public/userfiles/file/gunekefadidifujurimaposi.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613192fd7b4ea---bidusonaraxax.pdfIn PDF document text
    • http://abwingssuffolk2.com/uploads/files/nizoziruwu.pdfIn PDF document text
    • http://hitplus.eu/userfiles/file/18760010839.pdfIn PDF document text
    • https://alwaysthesame.pt/site/upload/file/80525232425.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/9b140f18511f6b441090cebb2de30b73/rakemilujero.pdfIn PDF document text
    • https://bunian-co.com/other_files/File/69738399734.pdfIn PDF document text
    • http://malovanesklomh.cz/images/file/vipisesekadutuxod.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=hercules+1997+free+onlinePDF 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_off0000e3ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3AC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fbbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBBE 20128 bytes
SHA-256: 800a8734e9ee1ebcac7c3b5eb8741b136ce79f5af7e5a8c0edd35280f5a4ae10
font_02_sfnt_off00012fb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FB7 10432 bytes
SHA-256: 8667b20087a91b2ae0704e0dccf64f536c86ba0536268e7361b719294073708b

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