Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd35e19a66600cc0…

MALICIOUS

PDF

77.5 KB Created: 2020-06-10 15:04:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: bb98428503f6e256af5a698716280f7b SHA-1: 48b7295162390a9b683ddc820c4cde222d999e8c SHA-256: cd35e19a66600cc07a17ebfbaba4e58eb79581c381ed24fbd2767adebd6533dd
96 Risk Score

Malware Insights

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

The PDF document was flagged by a machine learning classifier as malicious. Static analysis revealed a large number of external links, many of which point to similarly structured URLs on different domains. This pattern is indicative of a link farm or a mass redirection scheme designed to distribute malicious content or conduct phishing attacks. No scripts were extracted, and the document body contained mostly binary data and metadata.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://haveaballdesignstudio.com/uploads/1/3/0/3/130379231/130379231.html#%25D9%2585%25D8%25A7+%25D9%2587%25D9%2588+%25D8%25AD%25D8%25AC%25D9%2585+%25D9%2583%25D8%25A7%25D8%25A8%25D9%2584+%25D9%2584+8.5+%25D9%2583%25D9%258A%25D9%2584%25D9%2588%25D9%2588%25D8%25A7%25D8%25B7+%25D8%25AF%25D8%25B4+%25D9%2583%25D9%2587%25D8%25B1%25D8%25A8 PDF link annotation
    • http://hoodxhippienails.com/uploads/1/3/0/5/130539637/5682417.pdfIn PDF document text
    • http://zurich.walkshop.org/uploads/1/3/0/4/130478106/69ce90f93.pdfIn PDF document text
    • http://called2mission.com/uploads/1/3/0/7/130738988/wenowe.pdfIn PDF document text
    • http://activitybarcoding.com/uploads/1/3/1/4/131437636/9551350.pdfIn PDF document text
    • http://aw001.vq.com/uploads/1/3/1/4/131438829/5313431.pdfIn PDF document text
    • http://angieblevinsart.com/uploads/1/3/0/9/130969888/jimirare.pdfIn PDF document text
    • http://thrivezone.com.au/uploads/1/3/0/3/130323818/litotikotaxa.pdfIn PDF document text
    • http://74-123-79-226.mgwnet.com/uploads/1/3/0/9/130969893/bd08c7057664ec2.pdfIn PDF document text
    • http://performanceinspired.com/uploads/1/3/0/6/130639209/450483.pdfIn PDF document text
    • http://general1948.com/uploads/1/3/1/3/131383383/1453577.pdfIn PDF document text
    • http://mail.dollhousetearoom.com/uploads/1/3/1/3/131383943/4375263.pdfIn PDF document text
    • http://nofone.net/uploads/1/3/1/6/131606331/6759693.pdfIn PDF document text
    • http://cpanel.cabincreekfarmstudio.com/uploads/1/3/1/0/131070566/gadorusupomob_vebate_janejati.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://fulazetula.files.wordpress.com/2020/06/suzataboxujesumakifa.pdfIn PDF document text
    • https://lovugamu.files.wordpress.com/2020/06/68864720545.pdfIn PDF document text
    • https://xuwafudigele.files.wordpress.com/2020/06/96766119449.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
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

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
stream_002_off0000cb45.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xCB45 32880 bytes
SHA-256: c824517aba12140b0493f2b0a6c110ce58dfd0cc73474d529e373b358cd78e40
font_01_sfnt_off000103c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103C7 10216 bytes
SHA-256: c876d128776b77639f75664bcca6329a73a4f10d0fca48f66e8943521bcba959

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