Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b49d20f0f488b42…

MALICIOUS

PDF

47.5 KB Created: 2020-03-11 14:25:38 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b23feff6a4d5aaa60f30b03adb910b8e SHA-1: f72fd9dfd5fad9f3f3fdd3bde252f989e69e9000 SHA-256: 6b49d20f0f488b42359ad8e8e7dada8833efdf07792c2442e03b95747bf69c67
96 Risk Score

Malware Insights

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

The PDF contains numerous external links, many with numeric slugs, indicative of a link farm or SEO spam campaign. The document body, though partially corrupted, contains text related to 'Achilles tendonitis recovery time nhs' and the wkhtmltopdf application, suggesting a lure to disguise the malicious intent. The ML classifier strongly flagged this PDF as malicious, and the presence of many external URIs supports this assessment.

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://15kyg.bpmtc.com/uploads/1/3/1/0/131070762/131070762.html#achilles+tendonitis+recovery+time+nhs
    • http://mamamiabeautyclinic.com/uploads/1/3/0/7/130775683/7117351.pdf
    • http://hvzaction.com/uploads/1/3/0/7/130775528/6000990.pdf
    • http://logicalaxis.net/uploads/1/3/0/3/130323260/98dca256db8b537.pdf
    • http://februaryvioletsenior.com/uploads/1/3/0/2/130274305/012642fe3.pdf
    • http://eljefeextracts.co/uploads/1/3/0/7/130740440/1550bf.pdf
    • http://nwraincreations.com/uploads/1/3/0/4/130488970/dde71.pdf
    • http://nonenone.org/uploads/1/3/0/6/130604782/nunupimutas.pdf
    • http://pattayabeachproperty.com/uploads/1/3/1/0/131070559/9962638.pdf
    • http://eliteeuromotors.com/uploads/1/3/0/7/130775897/pumejurefaduzinitek.pdf
    • http://crystalcatdesigns.com/uploads/1/3/0/7/130740456/fuvupe.pdf
    • http://englishfast.org/uploads/1/3/0/6/130621836/720058c57.pdf
    • http://www.exceptionalcareelite.com/uploads/1/3/0/3/130313429/fidimotizukadinow.pdf
    • http://www.laurencegestalt.com/uploads/1/3/0/7/130776334/dedatasomenunul.pdf
    • http://www.laurabirdsallglass.com/uploads/1/3/0/6/130604233/bulonaweba-juxotaxiluxiw.pdf
    • http://bglcgolfouting.org/uploads/1/3/0/6/130604765/wexasamexexokedobu.pdf
    • http://incrediblemeatdeals.com/uploads/1/3/0/2/130289375/bujomuwazobuwuro.pdf
    • http://www.cfactorx.com/uploads/1/3/0/7/130776338/xovogiwibaxoxexuf.pdf
    • http://jmjfitness.co.uk/uploads/1/3/0/5/130541661/mivudefodakom.pdf
    • http://karenhillock.com/uploads/1/3/0/8/130813042/kufigagegaw.pdf
    • http://binaripi.com/uploads/1/3/0/7/130738936/wonabebe-dadenoveneperon.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009160.bin
fa9cf0c8d10132c9de165c19d2b6312a4aa789ab34cd0dde37f5f2118b286ab7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9160 7564 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.