Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d451f7fe0cea533…

MALICIOUS

PDF

76.9 KB Created: 2021-03-29 13:24:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 4e7343bf46459b2961523bbc4a9a5d98 SHA-1: 4f635cd75706a20c73629e2e7c9dc1af99ea05ba SHA-256: 6d451f7fe0cea5336426f04d5b8dbe6baa423f6d7c23fbb60e6fd84a7579ddb6
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 0.9998

Heuristics 5

  • 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 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://gimoguvi.ru/wix?keyword=block+strike+hack+apk+dinheiro+infinito PDF link annotation
    • https://juwufugoxeza.weebly.com/uploads/1/3/4/5/134528381/jowajorana.pdfIn PDF document text
    • http://dorightunion.com/618119125234dvhm.pdfIn PDF document text
    • https://xelipifexejup.weebly.com/uploads/1/3/4/8/134848770/1884139.pdfIn PDF document text
    • http://kigadotezolesun.mypressonline.com/44245301733.pdfIn PDF document text
    • http://1xbets-regs.site/what_does_seeing_yourself_pregnant_in_a_dream_mean29rrn.pdfIn PDF document text
    • http://gebuhrenfrei-mein.com/21129471612dbrgj.pdfIn PDF document text
    • https://wotunuwojos.weebly.com/uploads/1/3/5/3/135393973/rurobikipedenemez.pdfIn PDF document text
    • http://phulop.store/nixajikazutelugudl4rq.pdfIn PDF document text
    • https://selubigal.weebly.com/uploads/1/3/4/5/134518702/17cef73d7bb.pdfIn PDF document text
    • https://gamubojuteno.weebly.com/uploads/1/3/5/2/135299935/4614947.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413987/normal_6047bc3a35ab0.pdfIn PDF document text
    • https://vobezadezera.weebly.com/uploads/1/3/4/2/134265653/7840d067db8b9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459325/normal_5feeea443136c.pdfIn PDF document text
    • http://leaninrzpd.site/how_to_scan_to_email_with_scansnap6yfby.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dogiwexor.myartsonline.com/us_states_and_their_capitals.pdfIn PDF document text
    • https://s3.amazonaws.com/vukusa/zipajititupigasibuwad.pdfIn PDF document text
    • https://s3.amazonaws.com/xukirizugukugi/john_dewey_pragmatism_in_education.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/75400921252.pdfIn PDF document text
    • https://s3.amazonaws.com/gasodamuza/92827169089.pdfIn PDF document text
    • https://s3.amazonaws.com/kujapomib/75792873663.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED6A 5356 bytes
SHA-256: 7f4992d9ade2c11ca6a0d7602cbc38919d0b34e0604456005fe8d7708b8d2805
font_01_sfnt_off0000ff9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF9C 12132 bytes
SHA-256: 984183e9f1f747fa204a5764f67e558978ef2fa12b5d9a620acbf8c84308408b

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