Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ae4bacb9817cd2d…

MALICIOUS

PDF

83.2 KB Created: 2021-03-11 15:22:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c63d21282cfc448ebf78660a94edd36b SHA-1: 5db309bf41d20f1be90732910b74bd9961eed5a8 SHA-256: 5ae4bacb9817cd2d1ee46a196dfaa9eb4c92c1d3ec2f428bf1c131e660225e80
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9991

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 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.
  • 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/strik?utm_term=dale+earnhardt+sr+autograph+value PDF link annotation
    • https://cdn.sqhk.co/tabuguran/hiegg6g/24956090180.pdfIn PDF document text
    • https://cdn.sqhk.co/japexexuko/r6UuGhd/270608350.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446260/normal_5ffc72bcae251.pdfIn PDF document text
    • https://cdn.sqhk.co/rapovixovuti/id6pcJ6/stories_your_choices_is_matter_memes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473410/normal_5fd37f3f53bad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409826/normal_5fd1472b7c87a.pdfIn PDF document text
    • http://duxalobojot.22web.org/43307831219.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445324/normal_6025a0a7263d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449184/normal_5fe85ab7004e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411932/normal_6010f169311e1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368242/normal_5fde23c06393a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370055/normal_5fe5afdde7594.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/memobofilenabon/88192410345.pdfIn PDF document text
    • http://ruxopagotar.epizy.com/2902210320.pdfIn PDF document text
    • https://e4fb9bf1-a3d6-4767-9bf2-2a1021e5dc09.filesusr.com/ugd/53cfc7_3898340d87c04cf4928673dfbb4f298d.pdf?index=trueIn PDF document text
    • https://35b1a599-9f45-4897-82ce-59a931fc5495.filesusr.com/ugd/daca0d_8e04a77ba9ca41dba79fcf132bf47308.pdf?index=trueIn PDF document text
    • https://aa3bb5c3-2bd4-4791-9e2a-6e31d5009b04.filesusr.com/ugd/60e703_321b28151856439785537fef7e88d7b3.pdf?index=trueIn PDF document text
    • http://vapoborino.rf.gd/wordpress_bangla_book_free.pdfIn PDF document text
    • https://b73db3ac-2e3c-475a-83ab-7f4668f00a8f.filesusr.com/ugd/80e8fa_de801114498948deb2981a25c5622a09.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/80879748588.pdfIn PDF document text
    • http://rutenodisekorin.rf.gd/adobe_creative_suite_free_full_version.pdfIn PDF document text
    • https://9005a25f-7293-4a73-bb0f-bc58e8c16807.filesusr.com/ugd/e3834b_be605e3fc86b4dd38955e994bcd46f73.pdf?index=trueIn PDF document text
    • http://xofuzugavup.epizy.com/black_airachnid_transformers.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000faf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF5 2900 bytes
SHA-256: 40ce0bc9b113ef031639604f059b60aa9f1e41b097d60e75bfbf620cccc66306
font_01_sfnt_off00010539.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10539 5280 bytes
SHA-256: d3a44c7009f1b2cdf200499162aa95c63e9f26334746e2dcd06473a185b8d42b
font_02_sfnt_off00011732.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11732 11076 bytes
SHA-256: f1102b89531a09ad565d05f32168d6b43632505ff9c6f32efff2d6bfefe5da5c

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