Malicious PDF — malware analysis report

Static analysis result for SHA-256 cba9f151bc0ea246…

MALICIOUS

PDF

86.5 KB Created: 2021-06-26 02:10:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 50ade9a354ef327e1a693bede9d661e8 SHA-1: 155194682dd46b5fda18b329f252edd56f2254c8 SHA-256: cba9f151bc0ea24623e0546041a5b7898f381c731a34e23d5043ddb900209d56
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were directly extracted, the PDF structure and URL patterns are consistent with common phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://alimentosldm.com/userfiles/file/modiluwojagora.pdf
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607076cd7ef10---18160502788.pdf
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3f82695867---nuzasawekifakat.pdf
    • https://ikima.fr/uploads/file/94495320656.pdf
    • http://dgjst.com/upfile/file/38117768997.pdf
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/5088b8bbc9041b9f45eb0fba0e1f53a4/suzerofuxejuwevonedese.pdf
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/64c9b41c76f12341a0f6d15a679cbfcd/kupiroderuxeme.pdf
    • http://nuitsdartistes.eu/images/file/50999498445.pdf
    • https://skspiti.com/userfiles/files/89518506921.pdf
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/7fa482384e7d17fbbdbb61d59454609a/79409333968.pdf
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d9b3a74b0c---73345322710.pdf
    • http://jhsclassof63.com/clients/c/c8/c8cc7cee7579ddcd469b669c0eb172d8/File/dofadupelovaxojevuvagune.pdf
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1607d02437019d---nerokupijojatuk.pdf
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087cd71b160c---vuxuporotikerevakugaxedog.pdf
    • https://himalayanthailand.com/image/upload/File/xezakoxula.pdf
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160736d2aeb07c---vikobodedarolobawal.pdf
    • http://curry-box-deluxe.de/userfiles/file/47730239744.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606d344329990---47917725790.pdf
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed3ea73d0d---23578823687.pdf
    • http://mamnonlittlesun.com/upload/files/50233542765.pdf
    • http://planbmedia.hufiles/perovimujepibap.pdf
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16077967da0e53---32157581173.pdf
    • http://drapa-technika.cz/UserFiles/File/37741470863.pdf
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b7ca590b7f5---23116252954.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=auto+headshot+app+for+free+fire
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec0e.bin
0435c907bbe7995886881796586b5549af93dd4505d4368fd9fdf8a6e23ee6b0
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC0E 17780 bytes
font_01_sfnt_off00011aff.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11AFF 16792 bytes
font_02_sfnt_off00013316.bin
796f3d7ac24e19780b38fef86961a4dabde0c50219ff91a0a99b362cee6bae0a
pdf-font-stream PDF embedded font (sfnt) at offset 0x13316 10524 bytes