Malicious PDF — malware analysis report

Static analysis result for SHA-256 7416ffa9c0e1a01a…

MALICIOUS

PDF

41.0 KB Created: 2020-03-30 06:12:25 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e381159d2efb53abb812a56aeaa520f3 SHA-1: 4836cab8745afee5421a3aa34adfd0ff8bd77dab SHA-256: 7416ffa9c0e1a01a7ac56a83c88563b2315b6d1b87353926bf9207af293a7c00
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body text, though partially obfuscated, includes a URL that matches one of the extracted links. This suggests the primary purpose is to direct users to a network of linked content, likely for malicious SEO or to serve as a distribution point for further malware. No scripts were extracted from this sample.

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://moodlabnewlife.nl/uploads/1/3/0/5/130551949/130551949.html#cual+es+el+pais+mas+grande+del+continente+asiatico
    • http://necesitoarte.com/uploads/1/3/0/6/130620783/5200183.pdf
    • http://harvestmoongrille.net/uploads/1/3/1/3/131382078/1057951.pdf
    • http://usecondomsensesyracuse.com/uploads/1/3/0/6/130604165/zamikupo.pdf
    • http://lisahorowitztherapy.com/uploads/1/3/0/2/130289292/7992112.pdf
    • http://mimismunchiesco.com/uploads/1/3/0/5/130588740/zodizumu.pdf
    • http://schablin-inc.com/uploads/1/3/0/7/130739076/xepufapiwib_sadesezo.pdf
    • http://thedissertationcoaches.com/uploads/1/3/0/6/130620923/4004375.pdf
    • http://slingshothawaii.net/uploads/1/3/0/5/130551375/1614736.pdf
    • http://tgpaintersmaine.com/uploads/1/3/0/3/130323329/bixag_tejijuzowi_badituked.pdf
    • http://lifeessences.co/uploads/1/3/0/4/130488834/julaxotol.pdf
    • http://5thplanetmedia.com/uploads/1/3/0/4/130476944/kikaxosoposuj-zabedevavigobaf.pdf
    • http://gertisglutenfreedom.com/uploads/1/3/0/3/130323342/b60d5d.pdf
    • http://fajocreatives.com/uploads/1/3/0/7/130775422/mipugumun_laluzuloxusuj_rusotobebenarip_zipuvuzutojefe.pdf
    • http://strategyconsultant.org/uploads/1/3/0/9/130969931/afe81fd7796f.pdf
    • http://booztees.com/uploads/1/3/0/4/130489742/vifaseguri-safigu-xupomubog-vonapob.pdf
    • http://source1football.com/uploads/1/3/0/2/130291489/fikakolasitive_tejakax_derer_wivutig.pdf
    • http://filipdanielsson.com/uploads/1/3/0/6/130639222/6586161.pdf
    • http://deeshasdesign.com/uploads/1/3/1/0/131070637/pogokiromuwuzetidezu.pdf
    • http://destinbeachphotographer.com/uploads/1/3/0/5/130540767/zekilopozuf_vipixutekore_dagakexidop.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_off000071ff.bin
bc2b343dc92d59f733d6dc5cb6d600877bd825b35a2bbf886230a59649b8e53c
pdf-font-stream PDF embedded font (sfnt) at offset 0x71FF 9800 bytes