Malicious PDF — malware analysis report

Static analysis result for SHA-256 a949e3cb92f3958a…

MALICIOUS

PDF

44.4 KB Created: 2020-03-30 14:57:07 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 01afdaa10d984511da078698908f63d8 SHA-1: 4b9d2cfa1dcba509b31e9e1aded14f7c426829e6 SHA-256: a949e3cb92f3958ad9e8433d72196eeb3d2b58ba7cf2b4f0050eefeb74ab0e8c
96 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, a technique commonly used for SEO spam or to direct users to malicious sites. The ML classifier strongly indicated maliciousness. The document body itself is largely unreadable, but the presence of numerous URLs suggests a redirection or phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://alexdanielski.com/uploads/1/3/1/4/131406591/131406591.html#las+zonas+del+quirofano PDF link annotation
    • http://boydcountyautomotive.com/uploads/1/3/0/4/130483909/1f2fb13df49aa5.pdfIn PDF document text
    • http://lukaczcreative.com/uploads/1/3/0/7/130738870/f06db.pdfIn PDF document text
    • http://stuckatthefarmmomma.com/uploads/1/3/0/7/130739405/6fa7132ba4.pdfIn PDF document text
    • http://vinepic.com/uploads/1/3/0/7/130776219/1d2662fa7a7.pdfIn PDF document text
    • http://bartschcchs.com/uploads/1/3/1/3/131383943/vadogagiwolinafex.pdfIn PDF document text
    • http://ericrobertsbuilder.com/uploads/1/3/0/4/130435658/a368bad81d830b.pdfIn PDF document text
    • http://actionlearning.nl/uploads/1/3/0/4/130477228/rinedusanusoda.pdfIn PDF document text
    • http://dimensionaldifferences.studio/uploads/1/3/0/4/130483550/gawuri_salej_lisolelelam_gewevewo.pdfIn PDF document text
    • http://maiermotor.com/uploads/1/3/0/5/130590244/6922981.pdfIn PDF document text
    • http://equityhr.com/uploads/1/3/0/2/130291449/7191397.pdfIn PDF document text
    • http://jessekaisermusic.com/uploads/1/3/0/5/130588635/3504614.pdfIn PDF document text
    • http://audiovisualrights.com/uploads/1/3/1/0/131070051/192573.pdfIn PDF document text
    • http://hall-elopement.rominastiebenphotography.com/uploads/1/3/0/8/130874305/delanonu.pdfIn PDF document text
    • http://pofvcall.com/uploads/1/3/0/2/130289246/lowogivixuwasu_motozinafox.pdfIn PDF document text
    • http://emmycodes.com/uploads/1/3/0/5/130588377/c6a70c.pdfIn PDF document text
    • http://crazybeautifulessentials.com/uploads/1/3/0/6/130640232/tetiruw.pdfIn PDF document text
    • http://stmaxens.com/uploads/1/3/0/5/130589036/2d8af.pdfIn PDF document text
    • http://thesmashmedia.com/uploads/1/3/0/6/130640088/99c2a2d290a.pdfIn PDF document text
    • http://toyshopreviews.com/uploads/1/3/0/6/130620382/kikedupava.pdfIn PDF document text
    • http://fheyouthcheer.net/uploads/1/3/0/7/130738997/zivujonazotavos-koxuj.pdfIn PDF document text
    • http://trustandfix.com/uploads/1/3/0/3/130379430/34dfcb26f41.pdfIn PDF document text
    • http://s-randolph-photo.com/uploads/1/3/0/5/130551625/1854252.pdfIn PDF document text
    • http://mdraketherapy.net/uploads/1/3/0/5/130550901/wakivufep_gegepiruze_lulepizejas.pdfIn PDF document text
    • http://goodemountainmemories.com/uploads/1/3/0/6/130621084/xivareraguperop.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

Related samples 8

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_off0000833c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x833C 8580 bytes
SHA-256: 126e35844b85132b7a222de2a5caa059410c8657e603999454cd7d4bd5d8af06

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