Malicious PDF — malware analysis report

Static analysis result for SHA-256 08c4988b432bc828…

MALICIOUS

PDF

124.4 KB Created: 2021-04-20 22:02:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 20ff7ddf616b94aa592afea13f0452ae SHA-1: 852255c859b9dbd1f581f43c8ddfba8ba4fe4e2e SHA-256: 08c4988b432bc828bbb3af2793b14ab71612fd2d6a81060b04c70c7181678983
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is a strong indicator of a phishing or malware distribution attempt. The ML classifier and ClamAV detection further confirm the malicious nature of the file. The document body, though heavily obfuscated, suggests a lure related to a poem, likely to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://nipisod.ru/strik?utm_term=tintern+abbey+poem+with+line+numbers
    • https://cdn-cms.f-static.net/uploads/4384821/normal_602ae45bbb0f7.pdf
    • http://girlsbeach.space/best_jump_scares_on_youtubewwqal.pdf
    • http://ukrdomonis.xyz/parrot_ck3100_installation_audi_a41vc4j.pdf
    • https://static.s123-cdn-static.com/uploads/4422884/normal_5fede829035cd.pdf
    • http://topsale.pro/29062568659ax6y1.pdf
    • http://tells.fun/motedevigakiwepekubaxixexohcm.pdf
    • https://cdn-cms.f-static.net/uploads/4379359/normal_60548e0add062.pdf
    • https://cdn-cms.f-static.net/uploads/4426676/normal_602800b406c69.pdf
    • http://gatorama.space/36503159150dfrji.pdf
    • http://theharaka.online/my_water_heaters_pilot_light_went_outx1jfo.pdf
    • https://static.s123-cdn-static.com/uploads/4425908/normal_600135dddedb8.pdf
    • http://metaleagle.ru/vavedanixebutepykn8b.pdf
    • https://cdn-cms.f-static.net/uploads/4475730/normal_604fc01a9090f.pdf
    • http://disconto50.info/ranixitogosonuligolotqim2v.pdf
    • https://cdn-cms.f-static.net/uploads/4385647/normal_602a7b285c87b.pdf
    • https://cdn-cms.f-static.net/uploads/4478683/normal_605fd08d00bbd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fefurorobumi/what_is_a_class_a_military_uniform.pdf
    • https://uploads.strikinglycdn.com/files/27775bb2-ce06-4cd1-9bfa-2423363b834a/90118464548.pdf
    • https://uploads.strikinglycdn.com/files/e1bfac20-f18b-4ad8-bfc8-c74b61db2c78/senior_machine_learning_engineer_salary_bay_area.pdf
    • https://s3.amazonaws.com/vudivuzakal/zikuzawisijitiniz.pdf
    • https://s3.amazonaws.com/gezetega/11078772649.pdf
    • https://uploads.strikinglycdn.com/files/b446e715-f162-4052-b255-9b7c68d5621f/42478318396.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_off0001ad3d.bin
fa4dc066c4f66b69818cec690f80395dd83ffeaf6afbd1b966566cc3e5af304c
pdf-font-stream PDF embedded font (sfnt) at offset 0x1AD3D 5344 bytes
font_01_sfnt_off0001bf4c.bin
f4f10c19f19acd33ff061fb4e3684b6827bad88cd5c74bae048f949fcd1d88cf
pdf-font-stream PDF embedded font (sfnt) at offset 0x1BF4C 10840 bytes