Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee5797b0222d4f4f…

MALICIOUS

PDF

93.7 KB Created: 2021-05-05 15:19:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 49326b517eccc04dc93290d255109a30 SHA-1: 703530eb0f01e7f2d1cd144e31cd14c852431850 SHA-256: ee5797b0222d4f4feafcde98e156227a31092f3dba29569dcdac20aeb087675b
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://zajinet.ru/strik?utm_term=cuanto+cuesta+el+metro+cuadrado+de+construccion PDF link annotation
    • http://gasufulezexe.22web.org/maastricht_v_guidelines.pdfIn PDF document text
    • https://suxugugufagiwa.weebly.com/uploads/1/3/4/7/134740592/ginozamawolu.pdfIn PDF document text
    • http://wowonofejubudib.iblogger.org/template_html_simple_responsive.pdfIn PDF document text
    • http://wusodopepufex.66ghz.com/bree_serif-_regular.pdfIn PDF document text
    • https://jowujutaxafekul.weebly.com/uploads/1/3/5/3/135348014/193218.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/template_beamer_latex_presentation.pdfIn PDF document text
    • https://s3.amazonaws.com/zoxewudunigus/jivasomumuma.pdfIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/20916859504.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/home_again_microchip_transfer_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec0c7aa4-18df-4a4f-9c76-fa349693906b/miracle_morning_savers.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/nda_maths_book.pdfIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/xikupa.pdfIn PDF document text
    • https://s3.amazonaws.com/jalasilunaz/28963838960.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7ae9821-aaf1-4ee0-b2b6-5b566aa031d0/feliz_navidad_tv_movie_cast.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84b96aa9-a5e2-40d5-9df2-c95f61faa410/14435014086.pdfIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/f5_server_load_balancer_datasheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e85b734b-745f-4bb1-abaa-cb6fec3ad133/6684748573.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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A0B 3296 bytes
SHA-256: 55c5f08bce00a45843a3aedde33d416befd4db4602cc15471b26e8ec5d64f3b9
font_01_sfnt_off00011596.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11596 4992 bytes
SHA-256: 42310e690eb9ef19d22e0f824a71af2c3dc310b9e7a13595021064fc672ca83e
font_02_sfnt_off0001266c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1266C 13476 bytes
SHA-256: b8e20cd61296b8a2b2f23d25f87fef90d8578dfb0653efaf3a41572b181a6c8c
font_03_sfnt_off000151a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x151A2 16164 bytes
SHA-256: 1f773c7a7450f03bde076cc55d70989549729bf7b3b780ce5eaadefca762edb6

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