Malicious PDF — malware analysis report

Static analysis result for SHA-256 935211ff71ce82e4…

MALICIOUS

PDF

45.5 KB Created: 2020-03-21 21:22:26 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 1a6a1fc7ad062b3e0a6e793bc2f07a61 SHA-1: 837acc8e09156081dcf5ffe3426387f907646f96 SHA-256: 935211ff71ce82e4ecdd7d6c2e3319c9c3652314e33d4b4296ea89df20808c7a
94 Risk Score

Malware Insights

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

The PDF document contains a lure related to 'Rheem gas furnaces reviews' and exhibits a high density of external links, characteristic of a link farm or SEO spam campaign. The ML classifier strongly indicated maliciousness. The embedded URLs likely serve to redirect users to malicious content or further phishing attempts.

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://chewoncakes.com/uploads/1/3/0/4/130489997/130489997.html#rheem+gas+furnaces+reviews
    • http://www.arclightrentals.com/uploads/1/3/0/4/130479435/6480134.pdf
    • http://joyfulpanda.com/uploads/1/3/0/5/130550976/3091128.pdf
    • http://withintheheart.org/uploads/1/3/0/3/130312914/7935311.pdf
    • http://artisanmadegemstones.com/uploads/1/3/0/5/130545882/wokawofibiz.pdf
    • http://theinnonsilverlake.com/uploads/1/3/0/5/130589031/3582317.pdf
    • http://kimhalcrophotography.com/uploads/1/3/0/2/130270777/takaguziviguro-mogexigajuviniz-dalif-mipidegipug.pdf
    • http://www.108dresses.com/uploads/1/3/0/4/130483276/gudugeliz_pokomazitim_tuxewugoxebako.pdf
    • http://koahspeargun.com/uploads/1/3/0/4/130483773/96642c0b3e17f2.pdf
    • http://capmovistarjp.com/uploads/1/3/0/5/130539269/32d763bea.pdf
    • http://www.knowtheblue.com/uploads/1/3/0/6/130620364/rolexigaxig-kowevebufuxagu-voful-getigunewofav.pdf
    • http://www.nugrun.info/uploads/1/3/0/5/130550683/jisuwub.pdf
    • http://estradatransport.com/uploads/1/3/0/2/130289693/162c767d0ef7.pdf
    • http://tools.hellogrower.com/uploads/1/3/0/3/130323337/xiwatixeraseb_safot_xupinidu.pdf
    • http://ginamoto.com/uploads/1/3/0/6/130621490/kawoja.pdf
    • http://www.beyondtheghosts.com/uploads/1/3/0/5/130550703/buzome.pdf
    • http://irenemusicschool.com/uploads/1/3/0/8/130874403/fesuxepagel.pdf
    • http://trilliumdayspaonjohnsriver.com/uploads/1/3/0/4/130476976/9418248.pdf
    • http://athleticoptimization.org/uploads/1/3/0/3/130313198/398e4220e0a7.pdf
    • http://finditwithease.com/uploads/1/3/0/7/130738780/d99c135f58b406.pdf
    • http://autocockerpartsblog.com/uploads/1/3/0/6/130640232/movelelitufalemejego.pdf
    • http://9f60mcb524.com/uploads/1/3/0/7/130739470/volena-zoxumekegadi-mibiwabumalugap-lepumax.pdf
    • http://www.yauno-olijven.nl/uploads/1/3/0/8/130814926/7010dc0a.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_off00008683.bin
d2cdd901612b4c44a5394819604e0d89d18144de24c104dbbef2814bcb0a30ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8683 9012 bytes

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