Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7beda903886b46a…

MALICIOUS

PDF

98.3 KB Created: 2021-04-03 10:58:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2863fb9796e2393c44c1ca7a021c24a8 SHA-1: eb8cf460cc057f60a9ea44e79a5c40ed5e139eb2 SHA-256: c7beda903886b46ad14b5d5902b6d50f4ca301666a4d3c3e7f341e190842084b
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://resalured.ru/123?utm_term=c+h+d+full+form PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4446162/normal_606231696292d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385012/normal_605f7e72e29b8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369632/normal_5fee4508c4ef0.pdfIn PDF document text
    • https://sofovelo.weebly.com/uploads/1/3/1/3/131379060/tosuripogetup-janis-tifil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375344/normal_602a37e999202.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382771/normal_5fd1e8c8102ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501645/normal_604951b0aaa5a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489422/normal_5ffa009c86148.pdfIn PDF document text
    • https://pusenosegunilo.weebly.com/uploads/1/3/4/7/134705238/panexatazituw-motir-musat-vedatawofufuwo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401538/normal_6023c66fdf75f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379970/normal_6024fc295e399.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370561/normal_5fec19c274f87.pdfIn PDF document text
    • https://petabururumeje.weebly.com/uploads/1/3/4/9/134902787/6541189.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4531626/normal_604f50ff10a2f.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/vukusa/canadian_citizenship_instruction_guide_adults.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/bryan_adams_everything_i_do_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/298543de-2711-47ba-a43b-5b179d417866/youtube_black_gospel_praise_and_worship_songs_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76dce512-196d-429b-aec0-81121a425ce7/bulletproof_coffee_recipe_dave_asprey.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012d82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D82 4664 bytes
SHA-256: 05eed69010e1b22eb54c7dffdcd8e55bec55bff8903ad9c3f250ee0e0983c99c
font_01_sfnt_off00013d30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D30 11924 bytes
SHA-256: c510db2df6a073a5a781261ac3e642a336ac6554bb9668a67431bf5f1abb53bf
font_02_sfnt_off000165bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x165BB 16144 bytes
SHA-256: 764fe263e68fd20aff2bbd96e69f5a400d440299d02096befa162391f913c7cf

Open this report in the interactive analyzer, or submit your own file for analysis.