Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffe5b30ce74bc241…

MALICIOUS

PDF

89.3 KB Created: 2021-04-13 18:33:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 77be6838f0c320bff23cb86d349080e3 SHA-1: 59750eb2b02a6bde7211ebecd4876669ac864dd1 SHA-256: ffe5b30ce74bc241b51011bd872837fb9bf5070a223aa120cee2ed6285d89feb
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 0.9997

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://gimoguvi.ru/strik?utm_term=fusion+juicer+website PDF link annotation
    • https://vubopedu.weebly.com/uploads/1/3/6/0/136083963/8501276.pdfIn PDF document text
    • https://fitokuzigijot.weebly.com/uploads/1/3/4/6/134681543/4194136.pdfIn PDF document text
    • https://fatitabo.weebly.com/uploads/1/3/4/7/134757356/9a2541483.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/36244743516.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8ade9fd-49f3-4a5f-82a9-05fcd2b6aa3e/343707940.pdfIn PDF document text
    • https://d2ea4bfc-f92a-4379-acf2-d9b69981ddb7.filesusr.com/ugd/739437_85bc029e0fe34c64810fc38af7f380f1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sefipa/adjectifs_possessifs_exercices_a1.pdfIn PDF document text
    • http://jevejizodirosaw.epizy.com/juzukudo.pdfIn PDF document text
    • https://5902ff30-e651-486c-ac37-3e8383bfa78f.filesusr.com/ugd/f35da0_8f6270588f7349f09cb72376f987160e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/822f4ee2-aaa6-4341-a934-70b2e3e3cb4b/51243110810.pdfIn PDF document text
    • https://s3.amazonaws.com/pirosisob/bmw_electrical_troubleshooting_manual_e36.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/93318977335.pdfIn PDF document text
    • https://s3.amazonaws.com/vibasujefir/anglo_norman_period_notes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20b9be03-3d99-4539-92fd-e2921344e40a/53378610460.pdfIn PDF document text
    • http://sabukizazuse.epizy.com/bicycle_dynamo_working_principle.pdfIn PDF document text
    • http://nowakimelufumi.epizy.com/27776197080.pdfIn PDF document text
    • https://c4cd0dbc-23d7-4f11-b65f-2561cec8abe5.filesusr.com/ugd/516793_b54c89027e0d4fc7a42833fd0d213be1.pdf?index=trueIn PDF document text
    • http://zuzimew.rf.gd/sedgewick_algorithms_in_java.pdfIn PDF document text
    • https://d4bcd744-2348-4fe3-9006-05b2fcbd3cbd.filesusr.com/ugd/704566_f6445d0a34ba405eb3740a5bb4bc6ce8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2a4b4e0-0358-43b5-9a1d-65855a264b81/xufiroxepu.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_off00011470.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11470 4696 bytes
SHA-256: 965d7f178eda4da5d9633795c5f6bae41b16a037473973c4a213a73548a272c0
font_01_sfnt_off00012484.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12484 10932 bytes
SHA-256: bbb1167ee64373cbeee994e1ac19792717784a31333f64f809919557eff5687a
font_02_sfnt_off000149a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149A4 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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