Malicious PDF — malware analysis report

Static analysis result for SHA-256 9506c8b6297bd6dd…

MALICIOUS

PDF

90.4 KB Created: 2021-06-27 00:51:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 01af4b68e538addcc264b2a22fe54ee9 SHA-1: 3e95a8de4c9b87eca6dcc62a7ad7223bd4cbb540 SHA-256: 9506c8b6297bd6dd3620b9d52de99b6f8928f59f1d234227b2cfb7f32c5849e9
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document employs a fake CAPTCHA lure to deceive users into clicking malicious links. The document contains numerous URLs pointing to compromised WordPress sites and disposable hosting, suggesting a phishing or credential harvesting campaign. While no scripts were directly extracted, the PDF structure and embedded links are indicative of malicious intent, likely leading to further malware download or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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://inwebjor.ru/uplcv?utm_term=private+profile+viewer+instagram+2020
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/fee6c3d8a6e19f0659d9bbdc9aaa3ff7/jugamikeme.pdf
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/f732abc441cef6ad4aab5fa2821c8a9b/xaxawebobinana.pdf
    • http://brmhn.com/userfiles/file/20210530081738_393gzd.pdf
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/8d36fbfd2ceafe122585c7eee6dda4bb/46104843088.pdf
    • https://www.basur-tedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d47f8eaa7c---61564117757.pdf
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074466dea9f5---34942106.pdf
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/d87c84ee6cb1cf8b4d84b501b7d9af6b/77947843681.pdf
    • http://anhuifan.com/upload_fck/file/2021-5-1/20210501203541296219.pdf
    • https://jurad.eu/files/file/nepadomifuxagikutiral.pdf
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a760c7b944b---morozifobirubemabuxiz.pdf
    • https://airbays.com/userfiles/file/noserawotowivexewu.pdf
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070bfa8e5624---rebemopusasoguj.pdf
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/05e3ae7900d625e808b2c17f6547645d/10387826287.pdf
    • https://nada70.org/userfiles/file/88041253521.pdf
    • http://gernano.eu/gfx/userfiles/files/lefatas.pdf
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbf20bdf563---36958023452.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cab2babf2c---29015417569.pdf
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b20379bca6c---forerapezipixaruva.pdf
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077d3753f795---ladaxamifagogonutojiziri.pdf
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16094c09dce056---22787492037.pdf
    • http://sacoorhealth.pt/site/upload/file/73940608300.pdf
    • http://goksirkrupskimlyn.pl/img/upload/files/pubagedoponaverinasimo.pdf
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f89f78a52137e1b323fe80b0d23c9d0a/14108423570.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_off0000fce4.bin
46eb962a1d6c2915bc03ff9ec5bfa3a623427292ee3cae8ba64c04bbac4e19fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE4 11096 bytes
font_01_sfnt_off000116d1.bin
d6452798e1895061627bfcb98d29d1b0f8dd04eb08659338d51452fc9ec250da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x116D1 17324 bytes
font_02_sfnt_off00014445.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14445 16792 bytes

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