Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdb70cf4491c15c4…

MALICIOUS

PDF

75.7 KB Created: 2021-03-05 16:03:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 54018371f829abdde1cd856776bb91e1 SHA-1: 88f108bdee93ddf726e8492fd62143820fca3f3b SHA-256: bdb70cf4491c15c44ae2a92747f6193797f0787f94ba644cf338c7cc2cd6d363
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF document that contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also strongly indicated maliciousness. The document body, though partially corrupted, suggests a lure related to 'happy rabbits', which is likely a pretext to direct the user to the malicious URL for phishing or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://lozipotod.ru/aws?utm_term=how+do+u+know+when+a+rabbit+is+happy
    • https://static.s123-cdn-static.com/uploads/4380523/normal_5fc776ee361aa.pdf
    • https://cdn-cms.f-static.net/uploads/4393900/normal_5feaee4d7fbea.pdf
    • https://bamufikike.weebly.com/uploads/1/3/1/6/131606241/292f785e0.pdf
    • http://nenotuwafuxigot.22web.org/minn_kota_trolling_motor_troubleshooting_guide.pdf
    • https://static.s123-cdn-static.com/uploads/4403259/normal_5ff8ffb869a33.pdf
    • https://wosapinilesodiw.weebly.com/uploads/1/3/5/3/135347506/43ff29c7a6.pdf
    • https://dewotime.weebly.com/uploads/1/3/1/6/131606762/zawose-fusepanomod.pdf
    • https://static.s123-cdn-static.com/uploads/4477181/normal_5fc94f42de40b.pdf
    • https://mibubibot.weebly.com/uploads/1/3/1/8/131871690/2108189.pdf
    • https://cdn.sqhk.co/soribivevi/jEJfjek/40078952963.pdf
    • https://lupilonugugi.weebly.com/uploads/1/3/1/6/131637558/83d19675ddd.pdf
    • http://suxiselukex.66ghz.com/compact_android_mobile_phones.pdf
    • https://cdn.sqhk.co/dasisogi/ajiayNU/nike_sportswear_icon_clash_shorts_fire_pink.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://vupikefugogulup.epizy.com/15474561904.pdf
    • http://kevatudoritek.rf.gd/eclipse_for_java_64_bit_ubuntu.pdf
    • http://vunonam.atwebpages.com/xelekum.pdf
    • http://rurebafib.onlinewebshop.net/51809491181.pdf
    • http://xufojeji.epizy.com/what_foods_to_avoid_for_flat_belly.pdf
    • http://vogojitipam.epizy.com/natedefojox.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9f1.bin
199da1c6b15f28dae159fad59564152919e15c967c999d799ee6e796d7291acc
pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F1 5376 bytes
font_01_sfnt_off0000fc40.bin
f9e90186e386da44bfd85640cf88151b82969b1ffad4f3ac97130b8dde352098
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC40 10848 bytes