Malicious PDF — malware analysis report

Static analysis result for SHA-256 497172d17ab3f7cf…

MALICIOUS

PDF

85.6 KB Created: 2021-09-15 12:43:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e6bc97a286e0cfed55ddbcfb9cf25dca SHA-1: d4481e402cb5538b6e684cd9a9bdcbe858c60e3a SHA-256: 497172d17ab3f7cff52c557fc6f142aeea9e0f93a9c03a0d9935166a18b4e0f3
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1534 Credentials from Password Reset

This PDF document is classified as malicious and exhibits characteristics of a phishing lure. It contains multiple external URIs, including one that appears to be a callback lure for fraudulent billing or subscription issues, and another that suggests a one-time code harvesting attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to credential theft.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://allytemp.ru/uplcv?utm_term=text+saying+your+messenger+verification+code+is+g PDF link annotation
    • http://seamacros.com/upload/file/vunabuxuzip.pdfIn PDF document text
    • https://xn--80aesyq.xn--p1ai/files/file/86789532525.pdfIn PDF document text
    • https://big-affaires.com/img/pics/files/42296230227.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613315f288154---55473543865.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16132030e07d7f---jezosijupu.pdfIn PDF document text
    • http://sweet-sugar.de/images/uploadedimages/file/mamujux.pdfIn PDF document text
    • http://celcg.pl/uploaded/file/3323126580.pdfIn PDF document text
    • http://rootbeadmill.com/upload_fck/file/2021-9-2/20210902141319907585.pdfIn PDF document text
    • https://singhaniabrothersltd.com/ckeditor/ckfinder/userfiles/files/45573677021.pdfIn PDF document text
    • https://1tlstar.com/storage/uploads/files/guzoxebise.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b8e1e784e6---98787482300.pdfIn PDF document text
    • https://insinkerator.us/images/uploaded/file/73526083081.pdfIn PDF document text
    • http://reszke.pl/fckeditor/editor/filemanager/connectors/php/file/24252114842.pdfIn PDF document text
    • http://xdata.pl/app/webroot/img/ckf/files/21153427991.pdfIn PDF document text
    • http://tvoirostov.ru/ckfinder/userfiles/files/somalisasesibazuzatu.pdfIn PDF document text
    • http://aokunoil.com/ckfinder/userfiles/files/13111443129.pdfIn PDF document text
    • https://securitydm.eu/slicice/file/16464439173.pdfIn PDF document text
    • https://zabulgaria.org/userfiles/file/45808680944.pdfIn PDF document text
    • http://honeycontacts.com/uploades/userfiles/file/67653716674.pdfIn PDF document text
    • https://expomediainc.com/upload/file/wikelovesererabel.pdfIn PDF document text
    • http://lotusromeo.fr/app/webroot/files/userfiles/files/41618046573.pdfIn PDF document text
    • http://gesundheit-im-blog.de/userfiles/file/litujexawugen.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/264470f5220f58f47633486dc15b14a9/kenawasimipovozedurizaze.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_off0000e8e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E6 17724 bytes
SHA-256: 30a718828eb960d21a9ec51c0c8feecd017f2913ef5f2a89d082ff9778810886
font_01_sfnt_off0001166b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1166B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012e82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E82 11120 bytes
SHA-256: ffead1a266c8889e064975da0d41eb9f0ade4ed4abdcc5e189acea8a0e038ea8

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