Malicious PDF — malware analysis report

Static analysis result for SHA-256 e06449ebbdddac51…

MALICIOUS

PDF

41.8 KB Created: 2020-03-28 12:59:55 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e16adb1c4cf954eb85ef7e9e478f82b4 SHA-1: cb97ec11ec20b29719905b71711ff7d4e0553b53 SHA-256: e06449ebbdddac51f4b2b20826833361fc0a0e677570cafc260aea082df7c62d
96 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 ML classifier also strongly indicated maliciousness. The document body, though partially corrupted, contains the title 'Psicologia del arte maestria' and references wkhtmltopdf, suggesting it might be a lure document. The primary attack pattern involves redirecting users to numerous external sites, likely for SEO spam or to host further malicious content.

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://multistreams.com/uploads/1/3/0/6/130639263/130639263.html#psicologia+del+arte+maestria
    • http://meaghanmccarthy.com/uploads/1/3/0/2/130287972/wagaxaxuvufi.pdf
    • http://circumferenceconsulting.com/uploads/1/3/0/3/130379051/bonezelixofefix.pdf
    • http://64-160-90-245.pacific-solutions.com/uploads/1/3/0/8/130813398/2884381.pdf
    • http://ppconsulting.net/uploads/1/3/0/2/130270958/pipinovezos_nasirogomomamus.pdf
    • http://nannynooeventco.com/uploads/1/3/0/4/130483564/patexug.pdf
    • http://nxtesports.com/uploads/1/3/0/6/130605078/woletigazipe.pdf
    • http://www.handsonprivacy.eu/uploads/1/3/0/5/130540083/a9360e54617.pdf
    • http://ndtasanantonio.org/uploads/1/3/0/5/130551543/56598e7ac6e1f.pdf
    • http://www.dairylandfiberarts.com/uploads/1/3/0/7/130739552/e211261e4f5a.pdf
    • http://cpanel.redkem.com.au/uploads/1/3/0/6/130605094/3604622.pdf
    • http://ardyainderawan.com/uploads/1/3/0/7/130739873/lewafitefaje.pdf
    • http://kimshairitis.com/uploads/1/3/1/1/131164537/5210140.pdf
    • http://apartmentmakeup.com/uploads/1/3/0/4/130476039/2318869.pdf
    • http://emilysnyderart.com/uploads/1/3/0/3/130313671/vozuvi_mivaxozugoge_loxeko.pdf
    • http://nanmade-bags.com/uploads/1/3/0/6/130639486/vugoroletenepoja.pdf
    • http://africablacksoapcompany.com/uploads/1/3/0/3/130313024/mufadejugufudem.pdf
    • http://krsfacilities.com/uploads/1/3/0/2/130287893/xejesileja_rurijoxubi_fegalo_zufezirasikaf.pdf
    • http://dogfriendlyrentalsonsanibel.com/uploads/1/3/0/6/130621462/puvajoginiravag_kerimizal_sonale_kapeximinozelu.pdf
    • http://flexledhd.com/uploads/1/3/0/9/130969917/9223739.pdf
    • http://antraflooring.com/uploads/1/3/1/3/131380000/4e02c2024b89e4e.pdf
    • http://www.purposethestore.com/uploads/1/3/0/5/130551192/c50c892427ac7e.pdf
    • http://jfkesol.com/uploads/1/3/0/7/130739349/723760.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_off000079a0.bin
907ea85581f25a4bd0e3c0968e07c748974b2364709a45ba0dbe1b8ffa5a76a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79A0 8320 bytes

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