Malicious PDF — malware analysis report

Static analysis result for SHA-256 667944d60e1e150e…

MALICIOUS

PDF

275.2 KB Created: 2021-07-02 04:26:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: c35060488084e8f494c3434cc400dc36 SHA-1: c260fbe330abc9a5f3db7d0c8442d6d6d51d0890 SHA-256: 667944d60e1e150e971c31528284b3f068d657d09e6d0ff60f54ed1fe43bcaf1
166 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains multiple links pointing to compromised WordPress upload directories and SEO redirectors, suggesting an attempt to lure users to malicious sites. The primary redirector URL is https://catamma.ru/uplcv?utm_term=sonic+1+all+chaos+emeralds, which likely serves as a lure for a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9724

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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 https://catamma.ru/uplcv?utm_term=sonic+1+all+chaos+emeralds PDF link annotation
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/93ed88ed7e0512ed97baeb657be66c3e/24117032947.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a965b967f4d---15004058925.pdfIn PDF document text
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/0a148fb47ab844f8063065f0b334f5e8/29053967994.pdfIn PDF document text
    • http://ehhs1969.com/clients/6/67/67a0fa02f482ea8575b7cec7429e43a8/File/kukigavusodidobosurad.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a90ad188a9d---sizilona.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c8770cc5bb23116f4521d2298299f002/71012285058.pdfIn PDF document text
    • http://vizit-k.net/uploads/editor/files/zupimapuredobatazades.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160be14e026d3a---rofesupabavirixita.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085843a10878---feminerofofokumilob.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c52bcf0a8ce---gekavumazaxamerewuki.pdfIn PDF document text
    • http://asirakademi.com/resimler/files/76747861844.pdfIn PDF document text
    • http://calisnt.com/uploads/files/fasefalimosufinoranu.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/1608fb1ce46067---35627858977.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/sod4o58kgh1ct4tk7ji0akelf6/65130267785.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acd29a304b2---radujemubixevukikiba.pdfIn PDF document text
    • http://ampletrekking.com/userfiles/file/72517671089.pdfIn PDF document text
    • http://lnyuanzong.com/uploads/files/20210624015046.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/ead2dr0ebhhdh9q819mb2a67d7/13817694030.pdfIn PDF document text
    • https://villatoscana-pi.it/userfiles/file/75536336394.pdfIn PDF document text
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/redovolikexumafetoze.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076286b60746---18117642838.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16079a3be200ce---fobegowo.pdfIn PDF document text
    • http://nfc.soo.jp/file/14008327516.pdfIn PDF document text
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0003ac0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3AC0A 13644 bytes
SHA-256: 97e79229f2370aefaf6ca14a3ef23ac7264b6fa84aee058d9be74184558bd4f1
font_01_sfnt_off0003d6c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3D6C8 21380 bytes
SHA-256: 411689d40fffd044616313f534c66bd854b6154133800c65587512fc86ed71ce
font_02_sfnt_off00040c1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x40C1C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00042433.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x42433 10664 bytes
SHA-256: a8591fdff32b636ab48d6a39d7832fdfb4cc50e62ac47ff5fcbae1490137a139

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