Malicious PDF — malware analysis report

Static analysis result for SHA-256 a329e54d0f786342…

MALICIOUS

PDF

48.4 KB Created: 2020-06-20 08:50:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: a88f7dd1b338593c9516b8d6f272422a SHA-1: d0d02a8b67435934121e9e1b911a725f91cc6f76 SHA-256: a329e54d0f7863421a4257238656f810c439f517bcd66c427015e2be236bac98
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links to other PDF files hosted on various domains, as indicated by the PDF_SEO_LINK_FARM heuristic. The document body also contains these URLs, suggesting a deliberate attempt to redirect users to external resources. The ML classifier also flagged this PDF as malicious with high confidence. 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://pepz.no/uploads/1/3/0/7/130776267/130776267.html#adornos+manuales+para+habitaciones PDF link annotation
    • http://palomboperformancecollection.com/uploads/1/3/0/6/130621312/wodutasabijubava.pdfIn PDF document text
    • http://spot2020.com/uploads/1/3/1/4/131437508/b6e76bb16.pdfIn PDF document text
    • http://ecoland-ip.com/uploads/1/3/0/6/130604105/765773.pdfIn PDF document text
    • http://webmail.call-kami.com/uploads/1/3/0/7/130740232/5113569.pdfIn PDF document text
    • http://found-and-lost.com/uploads/1/3/0/6/130604656/3a487a70d1a1.pdfIn PDF document text
    • http://justlivingfit.com/uploads/1/3/1/1/131164475/sibidatetarox.pdfIn PDF document text
    • http://youniquedancewear.com/uploads/1/3/0/3/130313161/kewediwavinafa.pdfIn PDF document text
    • http://starsfinejewelryme.com/uploads/1/3/1/0/131070178/kejimegav.pdfIn PDF document text
    • http://josiahdavidgathing.com/uploads/1/3/0/9/130969999/6317330.pdfIn PDF document text
    • http://emilydelbridge.com/uploads/1/3/0/2/130291908/rawox.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 7

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A91 5324 bytes
SHA-256: a11286189ad01a0e643327c803d326be6fca05c0f14c29a4c3ef8378fb1f5b0c
font_01_sfnt_off00007c6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C6B 10348 bytes
SHA-256: 28c052b4dce69d212f71d5c2d502fa0f85c6754f346baf7392443da9384c4221
font_02_sfnt_off00009e5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E5E 16204 bytes
SHA-256: 819669da027870e643409ff2bd3960a3cbc5c372902e67f19a25d316ec5e9e1d

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