Malicious PDF — malware analysis report

Static analysis result for SHA-256 beea664696f709e6…

MALICIOUS

PDF

84.9 KB Created: 2021-09-14 05:12:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 1d5992759bdef8b25e35b4e5c173c2e0 SHA-1: 358d80f9598e1eada753f33d86a402d3d296de0b SHA-256: beea664696f709e6d509cedac69fa023e204280da2bb9131d09f92f77edda0d8
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing or trojan delivery mechanism. It contains numerous URLs pointing to potentially compromised websites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of a 'Callback phishing phone lure' heuristic indicates the document may also attempt to trick users into calling a fraudulent support number.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • 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://queure.ru/uplcv?utm_term=how+to+add+image+android+studio PDF link annotation
    • https://careerexpo.alljobsinliberia.com/ckfinder/userfiles/files/kodupizapina.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613aea879eb71---92458458483.pdfIn PDF document text
    • http://rosniyom.com/userfiles/files/negevekanezovomivugugobob.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/534c0ttonqend02pe2umf2rca4/pudobatulejawojon.pdfIn PDF document text
    • https://best-of-geldanlagen.de/userfiles/file/99070269648.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/3429835a5a5cead344989f4f721efa4f/desupezomuxilawa.pdfIn PDF document text
    • http://kerekagy.hu/UserFiles/file/94480040204.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/e04a9868e29bacf35e569f2d8f8fe174/wipuxa.pdfIn PDF document text
    • http://dailynewsodia.com/assets/ckfinder/core/connector/php/uploads/files/98751621796.pdfIn PDF document text
    • http://woodbridgeabw.com/uploads/files/danijeja.pdfIn PDF document text
    • http://linhkienhunganh.vn/luutru/files/begobopomotesigon.pdfIn PDF document text
    • https://www.loscam.com/lib_common/ckeditor/ckfinder/userfiles/files/soloxor.pdfIn PDF document text
    • http://colegiosantarosa.com/uploads/imagem/file/2128067636.pdfIn PDF document text
    • https://manuscripthandler.com/userfiles/file/fowusuzalumofugi.pdfIn PDF document text
    • http://leebyunghun.org/new/upload/board/files/54074440079.pdfIn PDF document text
    • http://master-vin.ru/files/file/18970985209.pdfIn PDF document text
    • http://elsped.hu/files/file/segimutepejomefufili.pdfIn PDF document text
    • http://ei-windykacja.pl/upload/file/lenuzitixo.pdfIn PDF document text
    • https://giorgiosantinelli.it/file/66039829239.pdfIn PDF document text
    • https://riminabda.sk/userfiles/file/4509925942.pdfIn PDF document text
    • http://dochoiotovn.com/uploads/userfiles/file/37552501861.pdfIn PDF document text
    • http://usaoxin.com/userfiles/2021-9/file/dizukajapegusi.pdfIn PDF document text
    • http://falerisztika.hu/tmp/22884364632.pdfIn PDF document text
    • http://canadanur.com/resimler/files/ligotovalas.pdfIn PDF document text
    • http://nhadep30giay.com/uploads/image/files/73715092718.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_off0000e854.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE854 17308 bytes
SHA-256: 177d9a61326a9fea538bcb380370a0e480959c0ec01551d73381fb744b3b17c4
font_01_sfnt_off000115e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115E6 10724 bytes
SHA-256: aff8ebef57f2499eb6c76332c0a8f30b9834287dcddf4b8d12431c7d0743a89e
font_02_sfnt_off00012e56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E56 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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