Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9c51d60921c91ce…

MALICIOUS

PDF

74.5 KB Created: 2021-07-01 10:56:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3062e4c0bf35409f5cedd6c2742863a8 SHA-1: 2780c17b74d2ccc1a0f6bf097a2b4bf36e5158ef SHA-256: a9c51d60921c91ce629a7d5f98e88ed369be4bd9a2b8dc4f1c98d00f7a52662a
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting a phishing or malware distribution scheme. The PDF structure and embedded links are indicative of a tactic to redirect users to malicious content.

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://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/ba33330769d9e8caeb0f87ae06309447/4408427413.pdf
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/mlgb61j758fnqhdt450ol3n9la/2903433068.pdf
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091bcbb7ca7a---58048273402.pdf
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d11c0431b8---27967641128.pdf
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/8e73b31db209f5d4205370e0ba07e9af/45687407551.pdf
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/16075bac69a737---gagowututimexakapaz.pdf
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd1ee9ef0ee---36133023484.pdf
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/3e47101a77442a15c7e98588e8527fd1/35821718895.pdf
    • https://binarbaidtrading.com/public_html/userfiles/file/17532521955.pdf
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b4b9b16711---tejesavajanusas.pdf
    • http://kleiberit.ru/files/file/nonun.pdf
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/06d66885ec1b766626bb9b22706267e1/34303169100.pdf
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ba14405a6fc---40843842140.pdf
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/5aadf9b5ec0c5c067e98cb557b925c73/97053239093.pdf
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4769d2cee33363a4f107ca8f80770709/gepaziwomexuso.pdf
    • http://nacnsuaa.com/clients/4/49/49ab1acc6c62b5a39110d621a19f71c0/File/jivegolifusojititolorozo.pdf
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/160978793a4935---31704096315.pdf
    • https://brianhigbielaw.com/UserFiles/file/58290630849.pdf
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c77f7456333---42446441227.pdf
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/148be6371487ff2f68fc9f609ae9bf49/bugizen.pdf
    • https://jackyrouxmethode.com/userfiles/file/99059819033.pdf
    • http://eros-arena.de/eros/userfiles/file/bonufo.pdf
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/7f7ac1b1421d13bd817d0df67079ee52/gaxaxitevakunagetaresiro.pdf
    • https://ilmercatinosottocasa.com/file/vexozeputavovilozuj.pdf
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/60b0e1c8594a2db0d44c5b9e621deeea/moxewakos.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=female+chihuahua+for+sale
    • 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_off0000c2fd.bin
4df97422112b753011d99336f7ebd81524728ff0eb13d8be6e1050b94aeb3af6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC2FD 10476 bytes
font_01_sfnt_off0000dab6.bin
a3dccc60d4b9379494ca4a73e4b4da66a68ad1a015bb3262652344c0c45cc67e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB6 16288 bytes
font_02_sfnt_off000104cc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104CC 16792 bytes

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