Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a71917729682a41…

MALICIOUS

PDF

38.0 KB Created: 2020-04-11 22:08:26 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b54ad7c3682ad5ca56d49ba9e961db9e SHA-1: d7398ae50b1baf4e92c04dbd8572c51a347d895a SHA-256: 8a71917729682a417f4a70bb502d973c621310eb7be95690d789dd53d5bdc246
92 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 are numerically or generically named, suggesting a link farm or SEO poisoning tactic. The primary URL points to a page with legal terminology, likely a lure to encourage clicks. The ML classifier strongly indicates maliciousness, and the PDF structure is consistent with hosting numerous malicious redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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
  • 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://bartolomeilaw.com/uploads/1/3/0/4/130491179/130491179.html#caracteristicas+de+los+testamentos+ordinarios
    • http://baufinanz-rheinmain.net/uploads/1/3/0/6/130620430/sizojafekozupaguxe.pdf
    • http://downdogz.com/uploads/1/3/0/8/130873735/bobevafigup.pdf
    • http://termdirect.com/uploads/1/3/0/4/130435914/5195461.pdf
    • http://grumpyguys.net/uploads/1/3/0/7/130776405/4015462.pdf
    • http://quickpickingselectronics.com/uploads/1/3/1/3/131383959/verilumogowu_vorubotudujid_sawosar.pdf
    • http://brookdaleventures.com/uploads/1/3/0/4/130477605/varuruva_nakizaxariruxu_bonamobakokolu.pdf
    • http://sftbco.com/uploads/1/3/0/7/130776075/butuwaduwixud.pdf
    • http://allstardogs.training/uploads/1/3/0/7/130776462/3518877.pdf
    • http://sublimewatercrystal.com/uploads/1/3/1/4/131437430/4602323.pdf
    • http://bluemountain123.org/uploads/1/3/1/4/131406741/kisekuta-vumov.pdf
    • http://minibitedelights.com/uploads/1/3/0/6/130620417/8b85b535ba.pdf
    • http://micamo.org/uploads/1/3/0/6/130604391/1878549.pdf
    • http://vngc007uninimbus.com/uploads/1/3/0/8/130814492/2564081.pdf
    • http://goodbullparking.com/uploads/1/3/0/3/130312916/9c33bd963cf.pdf
    • http://shifty-showcase.com/uploads/1/3/0/6/130620943/d409011747.pdf
    • http://minibitedelights.co
    • 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_off00006d40.bin
42e2b39f1bae307c558e9e299386b828ffbe6bda893aaa891a7877587b092738		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D40 8120 bytes

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