Malicious PDF — malware analysis report

Static analysis result for SHA-256 76209dde29d36531…

MALICIOUS

PDF

34.4 KB Created: 2020-03-06 15:57:50 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 1230209ccf35bd83d3ce34c2ab5667c8 SHA-1: 93a24afea4679df9c68aa27e7d06f1da8d2c6c33 SHA-256: 76209dde29d36531c5845d8524c9d14ea35c58bbcdb06f1e1c4fcf4a1b8a1acb
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDF files hosted on similar domains. This pattern is indicative of a link farm designed to drive traffic or potentially host malicious content. The ML classifier strongly supports the malicious verdict. No scripts were extracted, limiting the analysis of direct payload delivery mechanisms.

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://fbfqvxi.brdge.org/uploads/1/3/0/4/130488158/130488158.html#teflon+bridge+bearing+pads
    • http://cacfountainoffire.org/uploads/1/3/0/9/130969633/9b44f37abd.pdf
    • http://www.pgthelabel.com/uploads/1/3/0/6/130604114/jusugawiko.pdf
    • http://liveinemail.net/uploads/1/3/0/5/130588370/gasasiruwu.pdf
    • http://www.pjsanimatedshorts.com/uploads/1/3/0/7/130776063/c7d1ce595df93e.pdf
    • http://palmsecurityservices.com/uploads/1/3/0/5/130551287/kofutolumakawuw.pdf
    • http://myncpl.com/uploads/1/3/0/5/130543050/xiketoralewasog.pdf
    • http://www.lab215spitta.net/uploads/1/3/0/7/130775951/xuxaruvevojes.pdf
    • http://sethgangwer.com/uploads/1/3/0/2/130272395/wegubowapote-ragipiko.pdf
    • http://aquinasenglish.com/uploads/1/3/0/2/130289271/likanebevatu.pdf
    • http://jenniferstanderferessentials.com/uploads/1/3/0/5/130589125/golizemabak.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_off0000614a.bin
20e0f84d01499770cd8bd1fe3de2c59f85aca004fc4d7b3eebedd4f7e3abbb81		 pdf-font-stream PDF embedded font (sfnt) at offset 0x614A 6972 bytes

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