Malicious PDF — malware analysis report

Static analysis result for SHA-256 560c7a4f610786fe…

MALICIOUS

PDF

82.7 KB Created: 2021-09-20 14:25:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: d13202e406d1d5ea3b4e79a7ae767145 SHA-1: 4c256c54edda35d30eca4671f1ee474916eba171 SHA-256: 560c7a4f610786fe27ba47d6837845413a1886f241f20ab3ba66af52c3705497
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious intent. The document functions as a link farm, directing users to numerous external URLs, one of which is associated with a callback phishing lure. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it is designed to redirect users to potentially malicious websites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=will+grayson+will+grayson+pdf+download PDF link annotation
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130e692ecfb1---47049675813.pdfIn PDF document text
    • https://al-farh-iq.com/upload/userfiles/file/86446133938.pdfIn PDF document text
    • https://hediyelikhanem.com/calisma2/files/uploads/tumadunobiwedomu.pdfIn PDF document text
    • http://jsqnchem.com/upload/files/54637780438.pdfIn PDF document text
    • http://veoguidecostarica.com/ci/userfiles/files/padelomesir.pdfIn PDF document text
    • https://kocgrafikavukatwebsitesi.demowebsiteleri.com/upload/files/36510014382.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/55970319688.pdfIn PDF document text
    • https://menokatea.com/ckfinder/userfiles/files/65058124693.pdfIn PDF document text
    • http://werder-ritter.de/UserFiles/File/28629501017.pdfIn PDF document text
    • http://proximeo.com/ckfinder/userfiles/files/56475545077.pdfIn PDF document text
    • https://telorgabus.com/contents/files/16390536906.pdfIn PDF document text
    • http://clinicaveterinariaalbese.eu/userfiles/files/18550706871.pdfIn PDF document text
    • https://full-flavors.com/img/Data/file/redesu.pdfIn PDF document text
    • http://artvideo74.ru/upfiles/files/tiviresujanademavekerexi.pdfIn PDF document text
    • http://ondamarinarest.com/upload/files/wusiworumasuxa.pdfIn PDF document text
    • http://ebiocell.com/uploadfile/file///2021091707081524.pdfIn PDF document text
    • http://alacarte-grafik.de/userfiles/file/38834282361.pdfIn PDF document text
    • http://asiavent.com/UserFiles/file///11226112298.pdfIn PDF document text
    • http://kimyasaldubeller.com/upload/ckfinder/files/31142951293.pdfIn PDF document text
    • http://seatraderhk.com/userfiles/vupenepafamaw.pdfIn PDF document text
    • http://electrogalicia.com/electrogalicia/recursos/archivos/91351828091.pdfIn PDF document text
    • http://retailcop.ca/files/matewinizujuwinorotif.pdfIn PDF document text
    • https://ariconium.cz/webpagebuilder/ckfinder/userfiles/files/88543149072.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_off0000dee5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f6fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6FC 10636 bytes
SHA-256: 16c9d578965852f1477541da5df35dde77d09480a13221165aec517181f6bcf3
font_02_sfnt_off00010f34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F34 17552 bytes
SHA-256: 44f85a8dc0411b73e25842327c6fb55d95c2f4f3eec5a11f562b2c22afebc23a