Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7fe3c8f7dbc2d79…

MALICIOUS

PDF

36.8 KB Created: 2020-06-14 13:29:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fded168210393abc127db581f67c8f9d SHA-1: 69c153a748b59328293c7eb2d07455f89e942108 SHA-256: f7fe3c8f7dbc2d799e75570f34935fabe21859a017fcf0e3321bf430b0298141
94 Risk Score

Malware Insights

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

The PDF file was flagged by an ML classifier as malicious. It contains a large number of external links, many of which point to domains that appear to be part of a link farm. The document body, though partially corrupted, contains text related to 'dance lesson los angeles' and includes several URLs, reinforcing the link farm heuristic. The primary attack pattern observed is the creation of a deceptive link farm, likely intended to manipulate search engine results or direct users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://blacksheepcomicselpaso.com/uploads/1/3/1/4/131454306/131454306.html#dance+lesson+los+angeles
    • http://bermonlawyersrsc.org/uploads/1/3/0/6/130604446/vuxojejivug.pdf
    • http://projectpetasos.org/uploads/1/3/1/3/131382239/mowomefanojuzosibux.pdf
    • http://kcmojie.com/uploads/1/3/0/6/130604049/f24c1ee10cf2f.pdf
    • http://g50gscs.org/uploads/1/3/1/8/131857364/54d770.pdf
    • http://hostmaster.centraltractors.com/uploads/1/3/1/3/131378816/fff7b357d7ffad1.pdf
    • http://spiritualresilience.org/uploads/1/3/0/6/130620556/dojerufawolij.pdf
    • https://vadobil.files.wordpress.com/2020/06/womaletowakolajepakukulu.pdf
    • https://nonibosefo834473601.files.wordpress.com/2020/06/64242648301.pdf
    • https://wazejiwifo.files.wordpress.com/2020/06/belurufatizipogexesozisik.pdf
    • https://lufomewirumi.files.wordpress.com/2020/06/vepefak.pdf
    • https://nubafegurobu.files.wordpress.com/2020/06/43421097206.pdf
    • https://nozofabobeve.files.wordpress.com/2020/06/98266010207.pdf
    • https://vixewusuzil.files.wordpress.com/2020/06/nopunevug.pdf
    • 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_off00006048.bin
3ea9582daddcc594faadfed19cb3cf1de218667424234f5f41c640fa191cda57		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6048 11696 bytes

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