Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a0c775f80c7abc3…

MALICIOUS

PDF

34.6 KB Created: 2020-03-13 10:50:26 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f65e93933532bb5f3d036a7574d5f33a SHA-1: ce472cbdb1a15fd8756d6a514ab3d2c565459ad6 SHA-256: 1a0c775f80c7abc3c97fccabf20670dbe09b01ff4edb33120ff85d1a26c70bb8
94 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF files hosted on different domains. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves redirecting users to these external resources, which could be used for SEO spam or to host further malicious payloads.

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://insurewithhoward.com/uploads/1/3/0/4/130488530/130488530.html#mitosis+and+meiosis+diagram+worksheet+answers
    • http://marianasumerced.com/uploads/1/3/0/6/130620492/f896376.pdf
    • http://www.alanajaneskincare.com/uploads/1/3/0/8/130874264/bikokufiri.pdf
    • http://www.backtopulse.com/uploads/1/3/0/8/130874073/12ae5419c.pdf
    • http://reservationwise.com/uploads/1/3/0/5/130543494/vojosoleb_raduk_xuposowa.pdf
    • http://mobileboutiqueadriannemerkling.com/uploads/1/3/0/3/130323103/6675375.pdf
    • http://peppercornstone.com/uploads/1/3/0/5/130588989/9157420.pdf
    • http://howtooutdoorkitchens.net/uploads/1/3/0/5/130539350/5233731.pdf
    • http://drgimbel.com/uploads/1/3/0/2/130291489/kabituni_toden_tegamago.pdf
    • http://evivatour.net/uploads/1/3/0/6/130621582/1887082.pdf
    • http://mta-sts.mail.thehomeeconomist.tv/uploads/1/3/0/9/130969974/968a5e36da8.pdf
    • http://picosense.com/uploads/1/3/0/8/130813913/gemanarot.pdf
    • http://solarscrappers.com/uploads/1/3/0/6/130621484/59bb1691ad7.pdf
    • http://mropsal.com/uploads/1/3/0/5/130589268/garasibezotom.pdf
    • http://atwliving.online/uploads/1/3/0/2/130274368/wesuxosifimuw-xidorati-jowotudaxu.pdf
    • http://banriapharma.com/uploads/1/3/0/2/130287291/8188940.pdf
    • http://www.themastertheory.com/uploads/1/3/0/5/130588482/gobajutawefubi.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_off00006062.bin
89babdc1a6820d41707e942b96914d67b227f70fc208fa037e8a78469f22361d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6062 7324 bytes

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