Malicious PDF — malware analysis report

Static analysis result for SHA-256 f488853ef1f90862…

MALICIOUS

PDF

41.3 KB Created: 2020-03-07 23:56:27 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 1bf3431359da4a558c89c9218c1ca091 SHA-1: 5b342ad2b7c04f1ca9af4b85e92229b7dcc6a591 SHA-256: f488853ef1f90862f7873c8534c233328e3a3bb211958687e3769dbe03e82b99
110 Risk Score

Malware Insights

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

The PDF document contains a lure for downloading a '3ds max manual' which is a pretext for a link farm. It embeds a large number of external URLs, many pointing to other PDFs, indicating a likely SEO manipulation or content distribution scheme. The presence of a 'Remote-support tool lure' heuristic suggests a potential social engineering attempt to gain remote access, although no scripts were extracted to confirm direct payload execution.

Heuristics 5

  • 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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://slbconsultingservices.com/uploads/1/3/0/5/130589285/130589285.html#3ds+max+manual+pdf+free+download
    • http://fladrs.com/uploads/1/3/0/7/130738939/1943851.pdf
    • http://formworkfixings.com/uploads/1/3/0/5/130540304/6833757.pdf
    • http://wind-surfing.com/uploads/1/3/0/6/130639700/xugubezut_lojerakowawu_kolux_silomejasovego.pdf
    • http://redraiderdelivery.com/uploads/1/3/0/7/130776895/gatelo.pdf
    • http://lipstickliberalnetwork.net/uploads/1/3/0/5/130589187/3079025.pdf
    • http://theloopnetwork.com/uploads/1/3/0/9/130969973/jatotisad.pdf
    • http://www.simplycraftedco.com/uploads/1/3/0/2/130289019/8306142.pdf
    • http://ddeusa.com/uploads/1/3/0/4/130483345/xerivad_dunuma_kilojipenamavaj_sirajoba.pdf
    • http://wingingitarts.com/uploads/1/3/0/7/130775680/kexugifitajeti-nulag.pdf
    • http://inc-questrikqerized.net/uploads/1/3/0/2/130272484/8b04db872b.pdf
    • http://mail.rmdiai.org/uploads/1/3/0/4/130478551/1651776.pdf
    • http://elise-bennett.com/uploads/1/3/0/6/130621856/lizoximizuzanem-saxume-xorig-mazesa.pdf
    • http://uniquelysatarus.com/uploads/1/3/0/5/130588451/sasipa.pdf
    • http://quirkgear.com/uploads/1/3/0/2/130289209/1852954.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006269.bin
1c9fc053254343f85718cfcde8ffacd982f8932877541ef1994bd4e3db296210		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6269 9380 bytes
font_01_sfnt_off000084f8.bin
afd8868629b61d85ec32a8a0de1ca84da82d48156cdd7447d7c4f51403cf5149		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84F8 5244 bytes

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