Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ab180883a4f0a67…

MALICIOUS

PDF

42.5 KB Created: 2020-03-15 00:06:38 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f546495063a7531b71fbbe2725fe5d3c SHA-1: 02bc6788e0240df8a08d3dbf4aa0031d7b055435 SHA-256: 9ab180883a4f0a67cab4da42c7b77b2eaa1e6dc706bc39ae8ed588cccc18b835
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body text, though partially corrupted, contains the phrase 'Overcoming barriers of communication pdf', suggesting a lure. The ML classifier strongly indicated maliciousness. The primary attack pattern involves directing the user to a link farm, likely for further malicious activity.

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://sdrvowners.org/uploads/1/3/0/4/130477945/130477945.html#overcoming+barriers+of+communication+pdf
    • http://cienciayamor.com/uploads/1/3/0/5/130547286/5667528.pdf
    • http://www.iamfleeklord.com/uploads/1/3/0/8/130814868/211e952b6ef2c.pdf
    • http://ivflush.com/uploads/1/3/0/7/130776561/b9f10b6c6b727.pdf
    • http://www.twosidesmovie.com/uploads/1/3/0/6/130603704/8506300.pdf
    • http://dolonlearningresources.com/uploads/1/3/0/5/130588546/todasev.pdf
    • http://www.cjconcep.art/uploads/1/3/1/1/131163983/lapirumipapeveteri.pdf
    • http://www.imsaccess.co.uk/uploads/1/3/0/5/130544191/demel.pdf
    • http://mohawkvapors.com/uploads/1/3/0/3/130313702/xadakaposuf.pdf
    • http://www.iammattcruz.com/uploads/1/3/0/5/130588484/749170.pdf
    • http://be5k.org/uploads/1/3/0/7/130738667/jafujusikimoreketa.pdf
    • http://orangecountyflamenco.com/uploads/1/3/0/6/130604740/jogojonax-nekasujikubefa.pdf
    • http://bitcoinroundtable.org/uploads/1/3/0/4/130477663/7987be1b.pdf
    • http://molletenglishconsulting.com/uploads/1/3/0/7/130776409/jotugivet-dosapajexa-rapogisujoliral.pdf
    • http://www.librarygraphics.co.nz/uploads/1/3/0/4/130489052/xirodunosofufula.pdf
    • http://hazelcturner.co.uk/uploads/1/3/0/3/130323705/nisufe.pdf
    • http://myfampow.com/uploads/1/3/0/6/130639516/9842234.pdf
    • http://thelanguagefinder.com/uploads/1/3/0/4/130491699/9537116.pdf
    • http://stout-mechanical-ok.com/uploads/1/3/0/3/130323167/ab8c97f7b457.pdf
    • http://securitycars.us/uploads/1/3/0/3/130323723/nebexevulit.pdf
    • http://kohsamuirentavilla.com/uploads/1/3/0/8/130814085/vamiwumeduwafer.pdf
    • http://debcavart.com/uploads/1/3/0/3/130379074/36fe7889afb5.pdf
    • http://healthyprinting.biz/uploads/1/3/0/2/130272477/264d1f093999df8.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_off00008139.bin
90011cd50d835f227c2ea92728f7d42c65ded0fb69f913f1951f3b94cefe23c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8139 6860 bytes

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