Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2b55cf6efff01fc…

MALICIOUS

PDF

38.8 KB Created: 2020-05-21 19:23:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: 9fc670cc0821c8b9fbde67092434d3ed SHA-1: e82923ee2eb111aa6b2251e77027d96a45b799fd SHA-256: e2b55cf6efff01fcf7f70ead25adf59afb52220d2d5fdd9ecb2edbdab4f4da61
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of external links, identified as a PDF_SEO_LINK_FARM heuristic. The document body, though heavily obfuscated, contains references to 'grade 1 reading comprehension' and numerous URLs. This suggests the document is part of a link farm or SEO manipulation scheme, potentially leading to malicious content or phishing sites. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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://allwestindustries.com/uploads/1/3/0/6/130620604/130620604.html#grade+1+reading+comprehension PDF link annotation
    • http://zianyalemus.com/uploads/1/3/1/8/131856495/099bce1aac1.pdfIn PDF document text
    • http://dandldistributing.com/uploads/1/3/0/6/130604986/3e6946ce55c6b3.pdfIn PDF document text
    • http://moses-balan.com/uploads/1/3/0/4/130491253/giwaj.pdfIn PDF document text
    • http://rainbowhouseshaveicesmoothies.com/uploads/1/3/0/2/130270845/6642877.pdfIn PDF document text
    • http://divinespirithealingcenter.org/uploads/1/3/0/5/130543133/virupizebusabadu.pdfIn PDF document text
    • http://plantseverywhere.com/uploads/1/3/0/6/130621337/vufabebavitewojos.pdfIn PDF document text
    • http://elysianwhitetails.net/uploads/1/3/0/3/130324206/4102464.pdfIn PDF document text
    • http://groundedearthyoga.net/uploads/1/3/1/0/131070753/3805757.pdfIn PDF document text
    • http://kingdomleadershipsummit.org/uploads/1/3/0/7/130775679/zomesomurelagi-kojufafevev-jesuriki.pdfIn PDF document text
    • http://helix-intraocular.com/uploads/1/3/1/1/131164132/gipilitoteb.pdfIn PDF document text
    • http://bluevalleylops.com/uploads/1/3/0/5/130590339/c0c897c4b87d52f.pdfIn PDF document text
    • http://casacutei.eu/uploads/1/3/0/6/130604048/3084843.pdfIn PDF document text
    • http://sristiorg.com/uploads/1/3/1/0/131069910/gexizinogejilaz.pdfIn PDF document text
    • http://allfireduppizza.net/uploads/1/3/1/4/131438819/367e782e8293d6.pdfIn PDF document text
    • http://dktransportllc.com/uploads/1/3/0/5/130589288/zabevagejinuto.pdfIn PDF document text
    • http://fortheloveofafrica.com/uploads/1/3/0/6/130604918/sawogifurogugukaw.pdfIn PDF document text
    • http://trikonafitness.com/uploads/1/3/0/4/130477131/sezesarojome.pdfIn PDF document text
    • http://keepthechangeentertainment.com/uploads/1/3/0/4/130436242/weloki.pdfIn PDF document text
    • http://woodnblock.com/uploads/1/3/0/5/130588295/sujiruko.pdfIn PDF document text
    • http://garyfowliemedia.com/uploads/1/3/0/9/130969631/mowum.pdfIn PDF document text
    • http://ktaconstructionmaintenance.com/uploads/1/3/1/4/131406669/letege.pdfIn PDF document text
    • http://sonny5ideup.com/uploads/1/3/0/7/130776262/51dbc1883aa2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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

Related samples 2

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

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C53 10332 bytes
SHA-256: 60cc5bd85b7097ed2d0b006b6ff2da993a3ecde2f766f68367c4f777626230ba

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