Malicious PDF — malware analysis report

Static analysis result for SHA-256 0719990e57d55153…

MALICIOUS

PDF

37.4 KB Created: 2020-04-06 12:09:42 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: ec15b9eb388506dd8684a103022469dd SHA-1: 77ad5e51cfdba81bdf0585e09e22436ba242e130 SHA-256: 0719990e57d55153b63448fdd6651889248df45478f2a73247cf2322227874c7
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a malicious intent to redirect users to potentially harmful websites. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

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://dustycockatoo.com/uploads/1/3/0/4/130435726/130435726.html#reloading+223+with+imr+3031
    • http://wiseovenbakery.com/uploads/1/3/0/4/130478520/diretoboxewi-jojir.pdf
    • http://crowesnestclothing.com/uploads/1/3/0/6/130603688/sagibadebiz-zokesifin-fobekoga-fumivi.pdf
    • http://mta-sts.redrockpilates.com.au/uploads/1/3/0/6/130604368/paxogefizamuv_nizudobuj_tikarirunivatu_toludazobexob.pdf
    • http://blueeyesandbarefeet.com/uploads/1/3/0/7/130775295/8342305.pdf
    • http://jonathonwise.com/uploads/1/3/0/6/130621496/pojurofigezanop.pdf
    • http://vintagecityfinds.com/uploads/1/3/1/1/131164506/bc35d41070eef4e.pdf
    • http://codynaz.com/uploads/1/3/0/2/130287808/migelujavasumojowi.pdf
    • http://firstbaptistmartinsville.com/uploads/1/3/1/0/131070483/bf063e180223ee.pdf
    • http://capitalconsigliere.com/uploads/1/3/0/3/130323817/gewadesol.pdf
    • http://onhandanalysis.com/uploads/1/3/0/4/130491166/1095792.pdf
    • http://rangeitoutdoors.com/uploads/1/3/1/3/131379792/xuwuxinovurowazipali.pdf
    • http://beyeglobal.com/uploads/1/3/0/6/130621281/50772a.pdf
    • http://beingrace.com/uploads/1/3/1/3/131398133/bofonibobebil_xagezuxekiv.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_off0000694d.bin
a5287e3a259d98697b949ed0b381b85243525b36e702129554e4492f03525337		 pdf-font-stream PDF embedded font (sfnt) at offset 0x694D 8184 bytes

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