Malicious PDF — malware analysis report

Static analysis result for SHA-256 9eb28fa9dfe560c6…

MALICIOUS

PDF

86.9 KB Created: 2021-07-01 22:46:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e58d8d29c2220d3ce63bcc2905b2ff74 SHA-1: 789381c19facb214b87e9d60bbf9569bd4536702 SHA-256: 9eb28fa9dfe560c64260c4274cafe5e4f2a36c152b154cc8d63d8e6a3b29fe18
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users. The presence of external URIs and link farms indicates an attempt to direct users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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
  • 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://philabc.ru/uplcv?utm_term=bloons+td+6+hard+guide
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160aa65a169d36---vunasadirimatifub.pdf
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16084d7975e59d---68015335933.pdf
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5fcbb19e8---82908412708.pdf
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/dhhbuufvgdit65pcvdbb7lc88k/jilojogifukifeluze.pdf
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aebb877f527---viwekowabokobubes.pdf
    • http://iburgisidimarsala.eu/userfiles/files/madopufanox.pdf
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/801f7ef8bdb78d1881b36e18fa488def/27118680109.pdf
    • http://lukasikgroup.pl/Image/files/6217200907.pdf
    • https://feng-shuiworld.com/userfiles/file/88709045105.pdf
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/e3264e58c76e532e2f8aa6bca369bffd/zekeki.pdf
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/cd593dc78db32bb88b67a8a5099a86e3/59620729399.pdf
    • https://agroadvanced.com/app/webroot/newsletters/editor/files/98881020541.pdf
    • https://bettyloupaints.com/userfiles/files/netarokemalukura.pdf
    • https://orangerun.re/photo/files/37239724986.pdf
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607c1f1cb5b54---mosibu.pdf
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/90e467d7d583b1ac2f1c98f24e95300f/15858702282.pdf
    • http://xn--o79av69abka850ab6c.com/upload/file/202105280003378968.pdf
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/g5erong46st5nrik2n0dlrcjmh/noroxagadisifujom.pdf
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dd8f3b70fee---nezuwusovavusodulas.pdf
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086b9f11b9b6---6905623341.pdf
    • http://www.nachtruhe.info/up/files/netopidigemafad.pdf
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607d7d7135e8f---40405415363.pdf
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160add59d9cfb9---53517934702.pdf
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/677e64db6bf080a684126731143fd9b3/18546240393.pdf
    • 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_off0000edd2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD2 16792 bytes
font_01_sfnt_off000105e9.bin
9d18e3d56bba1bac2bce1335a7852791a658c9e56fd71eb0f233e3df71434c79
pdf-font-stream PDF embedded font (sfnt) at offset 0x105E9 10848 bytes
font_02_sfnt_off00011ebd.bin
e612f4602eeac0992f24fd23aa9efbccd626fea710ebdec53131b8c55cd58671
pdf-font-stream PDF embedded font (sfnt) at offset 0x11EBD 17552 bytes