Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dfef728ed6a0f5d…

MALICIOUS

PDF

45.3 KB Created: 2020-03-08 12:49:59 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 5f992e49e1caee94adea3056826803f1 SHA-1: 401b3a17e97b75907150f0194205ba6e4e0abb52 SHA-256: 1dfef728ed6a0f5dd0a34f2f2b94693310654480161a9bacbbee74382b22f8a7
70 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. One of these links, http://totallydreams.com/uploads/1/3/0/5/130550697/130550697.html#optum+medical+network+prior+authorization+form, appears to be a lure for a fake authorization form. The primary purpose seems to be SEO manipulation or directing users to potentially malicious content hosted on numerous domains.

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.
  • 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://totallydreams.com/uploads/1/3/0/5/130550697/130550697.html#optum+medical+network+prior+authorization+form
    • http://kindheartscoll.com/uploads/1/3/0/5/130546024/vejexoj_lafodi_subofibusujameg.pdf
    • http://missioncapitaladvisorsinc.com/uploads/1/3/0/7/130740210/96f3a859f025.pdf
    • http://whattimeisitinchina.com/uploads/1/3/0/6/130604626/lanolozevofudojafar.pdf
    • http://trilogyyarns.com/uploads/1/3/0/4/130477541/521046.pdf
    • http://www.serenityhousekeepingservices.com/uploads/1/3/0/2/130272318/42095dac89d7.pdf
    • http://www.petalcbdsandiego.com/uploads/1/3/0/7/130740497/ce332.pdf
    • http://seattle37partners.com/uploads/1/3/0/6/130604574/tironatitabosa_xajixipemapem.pdf
    • http://mta-sts.mail.mysticalfeathersaviary.com/uploads/1/3/0/4/130476346/86d8eb1bb0.pdf
    • http://icfem-registration.com/uploads/1/3/0/8/130813497/5b172df13.pdf
    • http://mpowerworkout.com/uploads/1/3/1/0/131069987/4821063.pdf
    • http://mta-sts.heathertuach.com/uploads/1/3/0/7/130775378/zopugowagakolo.pdf
    • http://freetermiteletter.com/uploads/1/3/0/2/130270743/9496382.pdf
    • http://chichomeinterior.com/uploads/1/3/0/6/130605017/bosened_dilejibiwipo.pdf
    • http://127onyork.com/uploads/1/3/0/7/130739839/gumozolu.pdf
    • http://rickformi.net/uploads/1/3/0/7/130739559/2241886.pdf
    • http://adjuvotechnology.com/uploads/1/3/0/5/130551090/pufavogodul.pdf
    • http://www.shiftintogreatnesstoday.com/uploads/1/3/0/5/130590367/1194841.pdf
    • http://ndsportschannel.com/uploads/1/3/0/5/130539179/zosikisotoferox-tudazidut.pdf
    • http://rockyourdaybook.com/uploads/1/3/0/6/130621800/8455998.pdf
    • http://sunnysidekids.com/uploads/1/3/0/8/130813764/a74c8dd2ae29.pdf
    • http://www.vibrantcarpetdyeing.com/uploads/1/3/0/7/130775786/06340441e8a6.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_off00007198.bin
237289e58e584715c48d861d66f9e66ad0eaa974ab36f6ffbbd837e170e5fc06
pdf-font-stream PDF embedded font (sfnt) at offset 0x7198 8264 bytes
font_01_sfnt_off0000917a.bin
f31c439e28d0137206b91a151f21343900f846ed9ff070250fbe82eb1cc7da1d
pdf-font-stream PDF embedded font (sfnt) at offset 0x917A 16204 bytes