Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d7172c814f43b26…

MALICIOUS

PDF

46.4 KB Created: 2020-04-03 05:00:05 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 1b057c4b3f16843912a43356c1468843 SHA-1: ee4d601f9728ac1782d0112cf3c6e847c11a8231 SHA-256: 9d7172c814f43b2681396c30b9a99398e0262dcc49f4621f1016f22e1601be43
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, many of which are numerically or generically named, suggesting a link farm or SEO poisoning tactic. The document body presents a question about molecular forces, likely a lure to disguise the malicious intent of directing users to these numerous external sites. No scripts were extracted, and the primary malicious activity appears to be the distribution of links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://michaudwellness.com/uploads/1/3/0/2/130270924/130270924.html#which+molecules+have+dipole-dipole+forces+check+all+that+apply.+check+all+that+apply.+ccl4+ch3cl+hcl
    • http://weevilcitycruisers.com/uploads/1/3/0/7/130775284/puferove.pdf
    • http://brackonholt.net/uploads/1/3/1/3/131379518/fijerol_pegiluzome_ravaz.pdf
    • http://weltanschauen.com/uploads/1/3/0/6/130621614/1765146.pdf
    • http://siriuselevation.com/uploads/1/3/0/3/130379285/30ae6b.pdf
    • http://covenantlifemicchanover.com/uploads/1/3/1/4/131454040/419178.pdf
    • http://hdwindowcleaningplus.com/uploads/1/3/0/6/130621548/7157502.pdf
    • http://josephmarshpowerwashing.com/uploads/1/3/1/4/131406448/05e48f4cd.pdf
    • http://yuktaahar.space/uploads/1/3/0/8/130874398/7318051.pdf
    • http://palmettocreditsolutions.com/uploads/1/3/1/4/131406182/gimizig_gerotabowavepif_goberifadesej_vusamawibixe.pdf
    • http://patriotcontainerhomes.com/uploads/1/3/0/4/130488696/6152540.pdf
    • http://sunrivericedammaintenance.com/uploads/1/3/0/6/130621328/4640379.pdf
    • http://paynterwvhouse.com/uploads/1/3/0/3/130323091/sovafuzoraxo.pdf
    • http://revenuesf.com/uploads/1/3/0/4/130490681/kitufazejopexexi.pdf
    • http://divinestagingandredesign.net/uploads/1/3/0/6/130620637/27f779cd23.pdf
    • http://blaircmc.com/uploads/1/3/0/7/130739476/07f18642.pdf
    • http://passionateleecurious.com/uploads/1/3/1/3/131384559/d40a6afda.pdf
    • http://nikkirelford.com/uploads/1/3/0/7/130740072/8f25c5ce6602e92.pdf
    • http://forestlakepoa.com/uploads/1/3/1/3/131382486/guzoparirojunutivaj.pdf
    • http://ricksaudidouble.com/uploads/1/3/0/8/130874518/mulemuza.pdf
    • http://waterproofcleveland.com/uploads/1/3/0/5/130547999/bapuzuguz_fategipuxu_rukudododu.pdf
    • http://iveryrealestate.com/uploads/1/3/0/5/130550660/2090759.pdf
    • http://benjadrink.com/uploads/1/3/0/6/130621158/4108948.pdf
    • http://amayaconsulting.net/uploads/1/3/1/4/131452947/magura-jibolov-xisomow.pdf
    • http://prettypushers.be/uploads/1/3/0/6/130605510/d1d93acf1d7dcb.pdf
    • http://rivercityelectrical.com/uploads/1/3/0/7/130775510/xolozumu.pdf
    • http://benjadrink.com/uploads/1/3/0/6/13
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000070f8.bin
d922ba5a677a8e3f151cd538459efa03f3fa243789b28bfff8f6a7ed40f7c3af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70F8 8084 bytes
font_01_sfnt_off00009034.bin
885781ec91db75dc8c4a6a3d3dac0324bdfdb8f2239dab70466c62035ae072da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9034 4144 bytes
font_02_sfnt_off00009d2d.bin
999525c50517e7ccb66b40055490eb49bd8c31d89769e3f0093c83e87d8d5080		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D2D 2820 bytes

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