Malicious PDF — malware analysis report

Static analysis result for SHA-256 7aa533b8483d2962…

MALICIOUS

PDF

77.7 KB Created: 2021-09-13 22:26:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: dd8ef80052130ecf203e4a1c65941330 SHA-1: d4e619006631ba59f974648729c65daa57cd5aae SHA-256: 7aa533b8483d296229035d18e39a1bc7ce064efc4cd0edf8a8c590c4c0af399c
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of phishing and callback lures. It contains numerous links to potentially compromised WordPress sites and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of QR code and phone number lures indicates a social engineering tactic to trick users into further engagement, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 8

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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 http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/goiortul9cc01ir75kfns4ljk7/pefaronipumotukizudawar.pdf In PDF document text
    • https://komunalno.vrgorac.hr/files/64388386310.pdfIn PDF document text
    • https://ferropula.hr/files/46389340534.pdfIn PDF document text
    • http://bajcsidavidfoto.com/_user/file/25975570990.pdfIn PDF document text
    • http://ttmplus.com/userfiles/files/79793031761.pdfIn PDF document text
    • https://iphone-odklep.si/vsebina/rokodedi.pdfIn PDF document text
    • http://grawerlik.pl/userfiles/file/solilonawuvoke.pdfIn PDF document text
    • http://hzzxtl.com/UploadFile/file/20210912112933803.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613f6e4276751---50035424207.pdfIn PDF document text
    • https://abogadosaccidentealicante.centralcms.cloud/galeria/files/29796039818.pdfIn PDF document text
    • http://miwon.com.vn/app/webroot/uploads/files/21242733849.pdfIn PDF document text
    • http://tekmaker.com/upload/files/6956228425.pdfIn PDF document text
    • https://strongpointmarketing.net/userfiles/file/83796314601.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/92f82419e3fb334a7f877e012e79dd08/1862266575.pdfIn PDF document text
    • https://karlschool.org/uploads/files/202109101122081161.pdfIn PDF document text
    • http://fusiongrup.ro/userfiles/file/nupiralijamo.pdfIn PDF document text
    • https://collinite.pl/userfiles/file/81182794216.pdfIn PDF document text
    • https://girl0229960192.com/upload/users/files/rabufupurotopunekofurule.pdfIn PDF document text
    • http://chrisdepanneservices.fr/Sites/cds/files/59175089427.pdfIn PDF document text
    • http://xn--h1aeekk.xn--p1ai/files/file/9458765288.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/9cbbf0khprvedm6llu76f03vp2/lavepilip.pdfIn PDF document text
    • http://fandimnarodaku.cz/upload/file/62286876455.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137e713561cb---69951987322.pdfIn PDF document text
    • http://dishandspoonproductions.com/ckfinder/userfiles/files/62205474738.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=scan+qr+code+androidPDF link annotation
    • 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_off0000ccaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCAF 10272 bytes
SHA-256: fb1a6d92e15e5b2f99ac40cbdf36d192761add8e10a687f4e96f11b2816a14e7
font_01_sfnt_off0000e3b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fbc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBC7 17556 bytes
SHA-256: 18aa80e88a039fe56aea07d95d33a4b272502dd2d9fe26e7c69cf53617da7d3a

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