Malicious PDF — malware analysis report

Static analysis result for SHA-256 d637ed0753ae8d96…

MALICIOUS

PDF

37.3 KB Created: 2020-04-13 00:14:36 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-08-10
MD5: 8e6aa523098c26378c387db007b3cc0b SHA-1: 42b726815f5abcc827796fc1557887ea3a1553cc SHA-256: d637ed0753ae8d962e0cda3a3e713807d38d8b4a4cee4f6e98da99db3b3e2cf3
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to domains that appear to be part of an SEO link farm. The document body, though partially corrupted, contains terms like 'Deshidratador solar semi industrial' which are likely used to attract search engine traffic. The presence of numerous unknown URLs suggests a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://lewisinsuranceinc.com/uploads/1/3/0/9/130969656/130969656.html#deshidratador+solar+semi+industrial PDF link annotation
    • http://416america.com/uploads/1/3/0/8/130874239/18ae8.pdfIn PDF document text
    • http://ensurd.com/uploads/1/3/0/6/130639259/zeludekexof.pdfIn PDF document text
    • http://apodera.org/uploads/1/3/0/8/130874639/gewafiviwixexo_baduduwez_nubikexoferuto_wipuzo.pdfIn PDF document text
    • http://boatandbarn.shop/uploads/1/3/0/6/130603709/2821564.pdfIn PDF document text
    • http://halfdollarhorror.com/uploads/1/3/0/5/130551472/wigikunifemovanarag.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://www.adobe.com/).NotoIn PDF document text
    • http://www.google.com/get/noto/http://www.adobe.com/type/ThisIn PDF document text
    • http://scripts.sil.org/OFLNotoIn PDF document text

Related samples 7

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_off000059e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59E7 9072 bytes
SHA-256: 1585e1204cee250a98a0f027517a424ff677371bc55c60cddbd6be0c51805520
font_01_sfnt_off00007a29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A29 4152 bytes
SHA-256: 0a8651204712d77b3df8786b20c09d46779fa8f6890d30c9d9c12e9401afa574

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