Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b386c2686a74428…

MALICIOUS

PDF

33.6 KB Created: 2020-05-02 21:06:35 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 1114bc59d8e4a1a3616c9aea324d0894 SHA-1: 7f32d19c40510a451b5087a445ec8ca67dd95c86 SHA-256: 8b386c2686a7442839389308fbdf88051fc02e3cfe1e41eb521a2e0e8105acfd
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier also strongly flagged this PDF as malicious. The embedded URLs suggest a link farm or redirection scheme, likely intended to drive traffic to other sites or host malicious content. 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://rogersconnections.com/uploads/1/3/1/6/131637190/131637190.html#knauf+insulation+data+sheets
    • http://tlctime.com/uploads/1/3/0/4/130483537/0f9d32b2146b76.pdf
    • http://westfieldsnews.com/uploads/1/3/0/6/130621273/8fe69e64330c.pdf
    • http://ranchoelzaino.com/uploads/1/3/1/4/131454807/95779bd81e7d6d2.pdf
    • http://seatspritz.com/uploads/1/3/1/1/131164185/8316499.pdf
    • http://pesansusu.com/uploads/1/3/1/4/131407493/78a1ecc3beef580.pdf
    • http://churchofchristgrapevine.com/uploads/1/3/1/0/131070469/d2c9bc9.pdf
    • http://beckypittman.com/uploads/1/3/0/4/130435893/sugujerulodes-sesep-bupoxaxokarup.pdf
    • http://theilta.org/uploads/1/3/1/4/131453821/2793fdd6d9c1d4f.pdf
    • http://nationwidepackinginc.com/uploads/1/3/0/8/130813841/fexesozabufaben-vovefe-tefikeditomab.pdf
    • http://heartisam.com/uploads/1/3/0/4/130435807/mozij_fupusetuxefev_xepasutipop_tagad.pdf
    • http://holidaysoffbroadway.com/uploads/1/3/0/3/130313037/0b4ece3e4b1b10.pdf
    • http://photobooth11.com/uploads/1/3/0/6/130639895/konituwesezubul.pdf
    • http://geersbackflowservice.com/uploads/1/3/0/6/130639774/6822719.pdf
    • http://caringforagingveterans.org/uploads/1/3/0/3/130313169/56eeddf5a729a3.pdf
    • http://schorcounseling.com/uploads/1/3/1/4/131409074/be5a57ad3fa2f67.pdf
    • http://prettyyummydiy.com/uploads/1/3/0/2/130274088/34cbdfd84d.pdf
    • http://iabtm.com/uploads/1/3/1/4/131407361/xivukegixalemap_nikebim_zikugobeli_sibekijosapeb.pdf
    • http://drsuemalley.com/uploads/1/3/1/1/131164024/texowo.pdf
    • http://tippecanoerealty.com/uploads/1/3/0/3/130323930/472ee6a9a0053a.pdf
    • http://theladydcollection.com/uploads/1/3/0/7/130738841/1074363.pdf
    • http://divinealkalineholywater.com/uploads/1/3/0/6/130621928/zemorunere-wivonakifiloje.pdf
    • http://spotlightstaging.ca/uploads/1/3/1/3/131379612/tudirugelo_xomamawi_puzagat_nawufeje.pdf
    • http://directgx.com/uploads/1/3/1/3/131383536/1231768.pdf
    • http://omnicamlab.com/uploads/1/3/1/3/131379421/9467eb3.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_off00005992.bin
8cdb2608526dcd85dad35d6f8d80599af4629f354c8860fed3328c58c338328b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5992 7764 bytes

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