Malicious PDF — malware analysis report

Static analysis result for SHA-256 46ba746610f57b79…

MALICIOUS

PDF

34.4 KB Created: 2020-04-15 12:45:11 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: eda2011254a464a9e7178f8a43832e6b SHA-1: 939e9f90d7c184b6c04b4eac9b4b432b83066b83 SHA-256: 46ba746610f57b79e019b5925701322ec8eaced6dc2ddd5e427e25dc130fccae
94 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, many of which point to other PDF files hosted on similar domains. The document body text mentions 'Offer up apk uptodown', suggesting a lure to download an Android application package. The ML classifier strongly flagged this PDF as malicious, supporting the interpretation of a malicious link farm designed to distribute malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://lexnlac.com/uploads/1/3/0/5/130547373/130547373.html#offer+up+apk+uptodown
    • http://pianotogo.com/uploads/1/3/0/5/130544790/eaaee2fc57.pdf
    • http://justwinginitindelta.org/uploads/1/3/1/4/131483830/turojodas-mikipubozo-wonukudoso-zozadowubutop.pdf
    • http://jamesagibson.com/uploads/1/3/0/4/130488786/2378293.pdf
    • http://disobedientwomen.org/uploads/1/3/1/3/131381991/zoforetewuk.pdf
    • http://bigcitycorvettes.com/uploads/1/3/0/9/130969887/firopobabitipiri.pdf
    • http://thecomeupsa.com/uploads/1/3/1/4/131406799/kiveget.pdf
    • http://natureofthebody.com/uploads/1/3/0/6/130620341/fupowokag.pdf
    • http://thukphus.org/uploads/1/3/1/4/131453005/kuwiduvawagume_javazeligejeba.pdf
    • http://natureofthebody.com
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e82.bin
017f07024153aa01d05a6cdf5bff85b60ba661f994219c1965f7518c7d267d5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E82 8332 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.