Malicious PDF — malware analysis report

Static analysis result for SHA-256 00e807589497d5bf…

MALICIOUS

PDF

80.1 KB Created: 2021-08-20 15:50:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f7edd4ccbb980ce0f889bc578c2c3bb2 SHA-1: 85d114ae6ef404d576260d1888e2c78e6110a443 SHA-256: 00e807589497d5bf63afc151ae8edbccefbfff0a32d8b7f0ca0e218e86fcecfa
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution scheme. The embedded URLs and link farm structure point towards an attempt to redirect users to malicious content, likely exploiting the 'Spearphishing Attachment' technique.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://wastran.ru/uplcv?utm_term=how+to+use+laser+pointer+in+zoom PDF link annotation
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/61983f458959df38935043169df212c7/47609933777.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160988f8d1ff8b---rulan.pdfIn PDF document text
    • http://arcomproltd.com/userfiles/file/xilozesuja.pdfIn PDF document text
    • https://jakspravnenapsa.cz/userfiles/file/fonadakupu.pdfIn PDF document text
    • http://cosyromania.com/media/file/85631251072.pdfIn PDF document text
    • https://arichaindia.com/userfiles/file/bukogaritazemulen.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c46658beb04---sexibatezifivubega.pdfIn PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/160899749781c4---xemam.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/5c73e7ff8425028138b8134f1398bc4e/60109828801.pdfIn PDF document text
    • http://aodaibooking.com/FileData/ckfinder/files/20210604_5D6BA8A17C9AC031.pdfIn PDF document text
    • http://retailcop.ca/files/nukosujetegatize.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a2021a3ea44---36066394062.pdfIn PDF document text
    • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606dfb228e3e5---gokededajuzexenanorav.pdfIn PDF document text
    • https://vienhung.com/webroot/img/files/debusufoxoxemor.pdfIn PDF document text
    • http://vladjurnalist.ru/archive/file/82446559672.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c78bc202fa---bubovewamasudebopifevuwe.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd935e95c9---80868965315.pdfIn PDF document text
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160911bb705f61---9003921753.pdfIn PDF document text
    • https://synersys.fr/contenu/file/17246991546.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/8b3994eef766b9db1a4da8fedd3586a9/dutenejaforonanu.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607a5c69cda12---70298164731.pdfIn PDF document text
    • http://ippon.lv/uploads/File/19277320185.pdfIn PDF document text
    • http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/68121878007.pdfIn PDF document text
    • https://bishopsalamatkhokhar.org/userfiles/file/bajolug.pdfIn PDF document text
    • https://fokusmedia.com/images/uploads/74154274510.pdfIn PDF document text
    • http://otohondamientay.com/upload/files/zozokumurosukebusixadonew.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d68a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD68A 10648 bytes
SHA-256: 0fa40027264c6451140e89b8dc210ce3d83507f8c25a86c13da809228023d965
font_01_sfnt_off0000eef1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF1 16928 bytes
SHA-256: 9f20fccd841802b09f0cabef20ace32fb38639c185a85a58ec302c0be3068632
font_02_sfnt_off00011acc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ACC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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