Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c7e69c1ad1a9f1a…

MALICIOUS

PDF

40.4 KB Created: 2020-06-01 23:42:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-07
MD5: 1ea61e652c99660258110cb2dbec1a11 SHA-1: 012af8fdbe3524d92d2b120af12e79d40d15e90f SHA-256: 7c7e69c1ad1a9f1a9468980395e0ef999bd8df8fcfa6ecc90e18fcb85d129ee8
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1190 Exploit Public-Facing Application

The PDF document contains a large number of external links, many of which point to seemingly unrelated content, indicating a potential link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external URIs suggests it may be used to host or redirect to malicious content. The document body itself appears to be a mix of metadata and potentially obfuscated text, further supporting a malicious intent.

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://201.bpmtc.com/uploads/1/3/2/3/132303219/132303219.html#britax+b+safe+35+car+seat+installati PDF link annotation
    • http://pratermarketingandmedia.com/uploads/1/3/0/6/130640095/1106673.pdfIn PDF document text
    • http://en.concordiaball.at/uploads/1/3/0/6/130639797/2eac92.pdfIn PDF document text
    • http://ryusushiaz.com/uploads/1/3/0/7/130776822/luxatokiv.pdfIn PDF document text
    • http://webdisk.digitalcitizenshipinstitute.com/uploads/1/3/0/8/130874599/tixelir.pdfIn PDF document text
    • http://gatewayhobbies.com/uploads/1/3/0/2/130288533/paxiranopolisigez.pdfIn PDF document text
    • http://mta-sts.mail.voiceconsult.nl/uploads/1/3/0/4/130435794/2011889.pdfIn PDF document text
    • http://mx.pitbullhill.com/uploads/1/3/1/4/131437508/sepow.pdfIn PDF document text
    • http://blackwallstreetcapital.com/uploads/1/3/0/5/130542908/fawodevixil-xixarotu-robamafesobo.pdfIn PDF document text
    • http://201.bpmtc.com/uploads/1/3/2/3/132303219/terms.htmlIn PDF document text
    • http://201.bpmtc.com/uploads/1/3/2/3/132303219/dmca.htmlIn PDF document text
    • http://201.bpmtc.com/uploads/1/3/2/3/132303219/policy.htmlIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://zosagadepug.files.wordpress.com/2020/05/pofefepi.pdfIn PDF document text
    • https://texufugibat.files.wordpress.com/2020/05/xurawiv.pdfIn PDF document text
    • https://tigeburilote.files.wordpress.com/2020/05/wafujufalepa.pdfIn PDF document text
    • https://zamefapud.files.wordpress.com/2020/05/zikujudat.pdfIn PDF document text
    • https://wuvenerige.files.wordpress.com/2020/05/43736937553.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://scripts.sil.org/OFLIn PDF document text

Related samples 3

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_off0000707e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x707E 11352 bytes
SHA-256: 3e8cf80bc58d4e1005142ded89e1f80401f0e433ab339f17a99793e10691927a

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