Malicious PDF — malware analysis report

Static analysis result for SHA-256 7262b312eb66ad2e…

MALICIOUS

PDF

38.8 KB Created: 2020-04-24 07:10:44 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 88287d4f74c79d48c318eb27a76f816e SHA-1: 5bdbe605226abe5c775d8959d4d70d6241231dc6 SHA-256: 7262b312eb66ad2e72e8de4167934569d393ea1d6f6cd369c6727259ca4ad629
96 Risk Score

Malware Insights

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

This PDF file exhibits malicious behavior by employing a link farm technique, embedding numerous external links to other PDF documents. The primary URL, http://tartanventuresllc.com/uploads/1/3/0/6/130604467/130604467.html#speak+now+album++zip, suggests a lure related to an album zip, likely intended to deceive users into visiting potentially harmful sites. The ML classifier strongly supports the malicious verdict.

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://tartanventuresllc.com/uploads/1/3/0/6/130604467/130604467.html#speak+now+album++zip
    • http://myatmosphereonline.com/uploads/1/3/0/3/130323163/8b451be88d.pdf
    • http://myconflicts.net/uploads/1/3/0/7/130775342/tosep.pdf
    • http://denmarkkabaddiassociation.com/uploads/1/3/0/3/130323929/3135149.pdf
    • http://mindfulneuropsych.org/uploads/1/3/0/6/130604324/sotazajasikokim.pdf
    • http://justforjeeps.net/uploads/1/3/0/6/130639865/f0b1b1f2.pdf
    • http://luxuryvietnamese.com/uploads/1/3/1/4/131411762/ff049.pdf
    • http://searkbn.org/uploads/1/3/0/4/130476048/8050486.pdf
    • http://everythingeastmark.com/uploads/1/3/0/8/130874222/2d11c28ab3e.pdf
    • http://stuijvesant.be/uploads/1/3/1/3/131379312/pabiwakag_jaxuvobenidob_zitudoposogif.pdf
    • http://dhsgovtr.com/uploads/1/3/1/4/131452883/6464054.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_off000070bc.bin
f798335f38b7ff97029f89f5395fc829cadddee70d1b8bdac38142b8a686598b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70BC 8148 bytes

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