Malicious PDF — malware analysis report

Static analysis result for SHA-256 2994a625b3053a61…

MALICIOUS

PDF

85.8 KB Created: 2021-09-21 00:03:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 74a6d42f069519edddccd6b9a2d8d170 SHA-1: e4ac487e8c52e55651915af4351949995c7e9a3b SHA-256: 2994a625b3053a619e4a56217a0da1c51a3f90dc160ab2411d7c9f62b8cf720e
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of a 'Fake CAPTCHA' heuristic indicates the document's intent is to deceive the user into performing an action, likely to download further malware or visit a malicious site. The numerous embedded URLs, many pointing to compromised CMS uploads or disposable hosting, reinforce the phishing and malicious distribution pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pistant.ru/uplcv?utm_term=free+minecraft+java+edition+code+generator PDF link annotation
    • https://serpavenger.com/ckfinder/userfiles/files/38009041448.pdfIn PDF document text
    • https://palezieux.com/ckfinder/userfiles/files/xevefuzet.pdfIn PDF document text
    • https://kcss.hu/korosi/userfiles/file/48336039791.pdfIn PDF document text
    • http://rudolphalexander.com/uploads/files/94294625848.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ffeb9b66dd---78477071683.pdfIn PDF document text
    • https://www.gryf-wet.pl/ckfinder/userfiles/files/37941491125.pdfIn PDF document text
    • http://inwama4.vn/webroot/img/files/rivasunikedizawibebapopap.pdfIn PDF document text
    • http://longbeach.ilovepokebar.com/uploads/files/21506078054.pdfIn PDF document text
    • https://satesayap.com/contents/files/82158035484.pdfIn PDF document text
    • https://watfordfairtrade.org/app/webroot/img/files/98708861497.pdfIn PDF document text
    • https://plantbiochem.com/ckfinder/userfiles/files/182109345.pdfIn PDF document text
    • http://mamaskitchenorder.com/uploads/files/31044005148.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/1bfed7664e0433bcb6caa2691b2a928c/fubosenilamuxefitoxu.pdfIn PDF document text
    • http://cosmik-kinoteatr.ru/sadm_files/446908625.pdfIn PDF document text
    • http://exito-opakowania.pl/userfiles/file/zilezasitogexu.pdfIn PDF document text
    • https://asharfilalkulfi.com/ckfinder/userfiles/files/todalofaxafopegatelekabij.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/16139c3fcc15a2---tajeropapad.pdfIn PDF document text
    • http://jiin-torng.com/uploadfiles/20210916171237.pdfIn PDF document text
    • https://razredna-nastava.net/files/jejoretesijolomeri.pdfIn PDF document text
    • http://phutungquanghieu.com/app/webroot/files/ckfinder/files/dekusopagolar.pdfIn PDF document text
    • http://scandinavia-ex.com/images/blog/file/zinotebibogalefawisesimi.pdfIn PDF document text
    • http://dezis.ru/uploads/files/61168232800.pdfIn PDF document text
    • http://erdbau-rauch.at/15504775226.pdfIn PDF document text
    • http://quanhoangtsi.com/upload/quangtri/files/liputagatipumuzufuxufopul.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_off0000ec20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC20 10776 bytes
SHA-256: b0a88b7fd0eb81f68acd18be2a7aa057188605fd272f1c6910c02cb8155215d8
font_01_sfnt_off000104af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104AF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011cc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CC1 17348 bytes
SHA-256: be5fbfbdf4251cfc69b6d17bb6b7840f43aa426e3df9b5d5ce74727ec7aee3ef

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