Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3a064deaf382c4b…

MALICIOUS

PDF

46.7 KB Created: 2020-04-05 13:33:39 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 7aab5c1682d63faa43042517c9e90435 SHA-1: 08e0f41f9a5e9f71110b424091613fc896f594d4 SHA-256: c3a064deaf382c4b3f49ac63fa922baae857ea29d45fb9f25c007f2dfd470467
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, all structured similarly to host PDF files. The document body, though partially corrupted, contains a title related to a science experiment, which is likely a lure to disguise the malicious intent of redirecting users to a large number of external URLs. No scripts were extracted from this sample.

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://huronvillas.com/uploads/1/3/0/6/130622083/130622083.html#experimento+del+huevo+en+vinagre+y+miel+explicacion PDF link annotation
    • http://robtheoctopus.com/uploads/1/3/0/6/130639593/5801530.pdfIn PDF document text
    • http://peaceofmindmediation.com/uploads/1/3/0/4/130488885/1076582.pdfIn PDF document text
    • http://tokyostv.com/uploads/1/3/1/0/131071262/1017834.pdfIn PDF document text
    • http://mathcollective.com/uploads/1/3/0/5/130551770/7404098.pdfIn PDF document text
    • http://grheatingandcooling.net/uploads/1/3/0/7/130775337/zubugexo.pdfIn PDF document text
    • http://cindykuan.com/uploads/1/3/0/9/130969754/665aa5.pdfIn PDF document text
    • http://athonlinestore.com/uploads/1/3/0/4/130483981/178efcd2c90.pdfIn PDF document text
    • http://advancednetworx.com/uploads/1/3/0/5/130540926/9004151.pdfIn PDF document text
    • http://ajbuilding.net/uploads/1/3/1/3/131384101/75db4.pdfIn PDF document text
    • http://magicfoodbus.org/uploads/1/3/1/1/131163774/8167180.pdfIn PDF document text
    • http://mstsrv11.mst.systech.ch/uploads/1/3/0/2/130272644/0ed9db3.pdfIn PDF document text
    • http://digibcard.com/uploads/1/3/0/4/130435509/gaxol.pdfIn PDF document text
    • http://shopsexxyness.com/uploads/1/3/0/6/130621185/5d7f61dd1b004.pdfIn PDF document text
    • http://nicleiboldthoughts.com/uploads/1/3/0/2/130287547/5117713.pdfIn PDF document text
    • http://kutsnakeracing.com/uploads/1/3/0/3/130313167/3139123.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 3

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000745d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x745D 9488 bytes
SHA-256: d45e759a165da0b76cb547e757db88206f57627223cbf12bf4229684c75f3c52
font_01_sfnt_off0000967d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x967D 16036 bytes
SHA-256: 779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63

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