Malicious PDF — malware analysis report

Static analysis result for SHA-256 183104bc05310ac8…

MALICIOUS

PDF

82.8 KB Created: 2021-05-13 08:52:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 312e4726e9e73bb8a299974c369fcdbd SHA-1: b06af2b033d266a81f1f227d6129db2194ed3e65 SHA-256: 183104bc05310ac8457ffbcc89158e0163aa03796564f9be3ad700a4c1886d21
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to a movie rating, which is a common social engineering tactic.

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://gimoguvi.ru/strik?utm_term=beautiful+creatures+2013+imdb+rating
    • http://kazexajisodibu.medianewsonline.com/79548552759.pdf
    • https://cdn-cms.f-static.net/uploads/4380692/normal_605b7a9497558.pdf
    • http://sluzhba1.net/does_either_configuration_violate_hunds_rule5ms64.pdf
    • https://zisumujabi.weebly.com/uploads/1/3/5/3/135315444/pigofonubojiju.pdf
    • https://cdn-cms.f-static.net/uploads/4443325/normal_600e86962fa14.pdf
    • http://furniture21.online/can_you_cancel_harley_davidson_extended_warrantyqmd21.pdf
    • https://cdn.sqhk.co/feziwetesene/HMuijjc/better_than_a_lemonade_stand_book.pdf
    • http://bikejesoxatelo.mygamesonline.org/pufaka.pdf
    • https://jujoxiro.weebly.com/uploads/1/3/4/8/134875196/8729442.pdf
    • https://cdn.sqhk.co/peferitukofa/UbG1tks/56255704773.pdf
    • https://static.s123-cdn-static.com/uploads/4388037/normal_5fcd9aaf5242b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://dojafeduzig.myartsonline.com/zimexubixapapedub.pdf
    • https://uploads.strikinglycdn.com/files/7a4518a4-e258-4f02-af92-a99a49bec921/ashtalakshmi_stotram_telugu_song_free_download.pdf
    • https://uploads.strikinglycdn.com/files/49e95109-08dc-40b4-8640-08afc9fdf851/firehouse_sub_calories_italian.pdf
    • http://vexabimumemig.atwebpages.com/wanux.pdf
    • https://uploads.strikinglycdn.com/files/61956c38-04c2-4823-887a-d9b7d68138e8/a_discovery_of_witches_season_1_episode_7_recap.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea99.bin
86e1f37d792f5ae51e022ab5ab7885aafaf4b0f8cf648242b0de829907bd69a8
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA99 5676 bytes
font_01_sfnt_off0000fe18.bin
6958fc0841adad9489088aa0f708d380e9669395ad6cfe52acd139f49e6ce64a
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE18 6020 bytes
font_02_sfnt_off0001127e.bin
b2d329cb3c454c5321c6d0869213e4bf942404012581b0a1a2a620ae193d3f22
pdf-font-stream PDF embedded font (sfnt) at offset 0x1127E 12768 bytes