Malicious PDF — malware analysis report

Static analysis result for SHA-256 727656246c272a40…

MALICIOUS

PDF

37.7 KB Created: 2020-03-08 07:04:33 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: cb23fd89c50e440b8f8cd84f0f48517a SHA-1: e7bb52579908db1c5bd8b0de4127db9ec5706105 SHA-256: 727656246c272a40f5c2dffa3240bf07181f32f2305441e1e2bff7506271c74d
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, many of which are structured as SEO spam. The document body text, though partially corrupted, suggests a lure related to 'ppt to pdf converter software for android'. The ML classifier strongly indicates maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of a link farm.

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://kingshotelsmunichcenter.devsite-1.com/uploads/1/3/0/3/130313513/130313513.html#ppt+to+pdf+converter+software+for+android
    • http://pattayathaimassage.eu/uploads/1/3/0/3/130323738/remutab-kugegamad.pdf
    • http://hostmaster.venezuelanscryforfreedom.com/uploads/1/3/0/6/130604501/zajawosemipon-zodasogegu-tazamaranalaxa-lufabem.pdf
    • http://www.komercallc.net/uploads/1/3/0/6/130621803/laxawesedisa_viluwufiridani.pdf
    • http://courtipie.com/uploads/1/3/0/8/130874001/6866925.pdf
    • http://1stpage.co.nz/uploads/1/3/0/4/130435947/vosewezaro.pdf
    • http://oasislebanesecuisine.com/uploads/1/3/0/7/130740530/merimumap_guzotuxop_ziwilodegidugel_goronefaw.pdf
    • http://theideamonger.com/uploads/1/3/0/4/130488993/kejomomen.pdf
    • http://miquelroig.com/uploads/1/3/0/5/130544243/2b12c2063.pdf
    • http://sparkleandshineshowclothes.ca/uploads/1/3/0/7/130775918/b3cc168d259574.pdf
    • http://gardenglassetc.com/uploads/1/3/0/6/130639439/jetajujaser_ganobawamodaga.pdf
    • http://iroxxapparel.com/uploads/1/3/0/5/130551258/1206365.pdf
    • http://sexualgames.org/uploads/1/3/0/6/130639404/5569783.pdf
    • http://www.threadingsydneycbd.com/uploads/1/3/0/7/130739810/zizowesa.pdf
    • http://extentrics.com/uploads/1/3/0/6/130620468/sabuzifexowawe.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_off00006bec.bin
76f6b7c9083e42a8a31c7374c61eea01c24df9be85fb9f83722c3650c6667c5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BEC 7576 bytes

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