Malicious PDF — malware analysis report

Static analysis result for SHA-256 83a692d3eacb3040…

MALICIOUS

PDF

45.1 KB Created: 2020-04-16 04:11:41 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-08-10
MD5: 516aea3d9a4fe77c6adbdaecf25bb488 SHA-1: aaa9f9b19732f02a21c0781950bcde8d672d3636 SHA-256: 83a692d3eacb304048fa07df516059aa3c5293c3509c6f88ddcd59efc327fcc6
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating it is likely a dropper. It contains a large number of external links, suggesting a link farm or redirection mechanism. The embedded document body text, though partially corrupted, mentions a 'competency mapping project report mba', which is likely a lure to encourage users to click on the numerous external URLs. No scripts were extracted, but the presence of many external links points to an attempt to redirect the user to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • ClamAV: Pdf.Dropper.Agent-9208097-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-9208097-0
  • 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 http://elenarcaballero.com/uploads/1/3/1/3/131379325/131379325.html#competency+mapping+project+report+mba PDF link annotation
    • http://howwemove.net/uploads/1/3/1/4/131407549/warosujete_nilumije.pdfIn PDF document text
    • http://diabetesrelatedretinopathy.org/uploads/1/3/0/5/130543855/mubiloxi.pdfIn PDF document text
    • http://skandinaviskgolfgruepppe.com/uploads/1/3/0/3/130323556/f8a01077c83f68.pdfIn PDF document text
    • http://fynesilver.com/uploads/1/3/0/5/130540118/4008296.pdfIn PDF document text
    • http://timeshareheroes.com/uploads/1/3/0/8/130813369/3119583.pdfIn PDF document text
    • http://twointernational.net/uploads/1/3/0/2/130289173/rawawitusedulat.pdfIn PDF document text
    • http://thehighend122.com/uploads/1/3/0/2/130291809/jaroximilanu-debovanujelovot-togudipiwi-vosebefikemete.pdfIn PDF document text
    • http://chickhenning.com/uploads/1/3/0/3/130323723/buvotivamozexorife.pdfIn PDF document text
    • http://lilybellesnaturals.com/uploads/1/3/0/3/130379118/namelefavog.pdfIn PDF document text
    • http://paymentcardsettlementclaim.com/uploads/1/3/0/6/130621472/tedesotulelufew-repepulopoxokan.pdfIn PDF document text
    • http://boatinsurance.wales/uploads/1/3/0/6/130620942/9895633.pdfIn PDF document text
    • http://songbirdonmarshill.com/uploads/1/3/0/7/130738939/padifexova.pdfIn PDF document text
    • http://beersignpickers.com/uploads/1/3/0/6/130639782/bomevipaguf_sagalafilareni.pdfIn PDF document text
    • http://childrensphysioonthemove.com/uploads/1/3/0/7/130738680/0abcf047b5c.pdfIn PDF document text
    • http://angelahoffmann.com/uploads/1/3/0/9/130969225/tidasiwosuburuwupinu.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007359.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7359 8076 bytes
SHA-256: 15d6e4057f6ee45d738258b33141e9fab5db828561f9bea0f2305ad3672ebf45
font_01_sfnt_off00009277.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9277 16096 bytes
SHA-256: 65ca2fa633a49bc637c245e3469a24bec82cbb291b9200d770c42ee2df1588ac

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