Malicious PDF — malware analysis report

Static analysis result for SHA-256 dee43bfa06f0a880…

MALICIOUS

PDF

36.4 KB Created: 2020-06-14 12:39:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 629d34d5ff33cbb2d9f2f44beafe03f5 SHA-1: ba1d56d90b51f7dc89f53d141abb5f21396649c2 SHA-256: dee43bfa06f0a8803615a9bb11b67c5327069c8220774751223730ebf1f7082c
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to unrelated domains and appear to be part of a link farm. The primary heuristic firing indicates a 'PDF_SEO_LINK_FARM', suggesting the document's purpose is to generate traffic or distribute malicious content through these links. The document body, though partially corrupted, contains a URL that aligns with this finding. 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://thesh3god.com/uploads/1/3/0/8/130874262/130874262.html#hip+flexor+exercises+and+stretches PDF link annotation
    • http://cpcontacts.pasha.com.vn/uploads/1/3/0/6/130603760/666397.pdfIn PDF document text
    • http://aprilbraund.com/uploads/1/3/2/3/132303005/8489519.pdfIn PDF document text
    • http://nainastreasures.com/uploads/1/3/1/6/131607232/67d0e7.pdfIn PDF document text
    • http://mta-sts.mail.ginkgoboomzorg.be/uploads/1/3/1/3/131383721/vidupura.pdfIn PDF document text
    • http://qualityapplianceslacey.com/uploads/1/3/1/4/131455328/sirezulikiguniwemon.pdfIn PDF document text
    • http://gate.tooey.com/uploads/1/3/0/8/130874666/6883268.pdfIn PDF document text
    • http://technicianscore.com/uploads/1/3/1/4/131437106/1276ceff6c.pdfIn PDF document text
    • http://tamarajohnston3d.com/uploads/1/3/0/2/130270776/9431111.pdfIn PDF document text
    • http://ascensoinversiones.com.co/uploads/1/3/1/3/131381135/1368758.pdfIn PDF document text
    • http://urgent1.com/uploads/1/3/0/6/130621776/1cb5d29b.pdfIn PDF document text
    • http://steveweir.net/uploads/1/2/9/4/129431029/129431029.html?carbonIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://nanesezup.files.wordpress.com/2020/06/remugim.pdfIn PDF document text
    • https://turomiwinawi.files.wordpress.com/2020/06/bugaban.pdfIn PDF document text
    • https://fatiwasorug.files.wordpress.com/2020/06/98397440339.pdfIn PDF document text
    • https://xaridozav.files.wordpress.com/2020/06/69388594735.pdfIn PDF document text
    • https://petobuxid622900373.files.wordpress.com/2020/06/87599011935.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_off00006255.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6255 9904 bytes
SHA-256: 4e9024cbf55d1fdc5ce9d938303929702e7a5702452caefc8bb18b1a78215662

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