Malicious PDF — malware analysis report

Static analysis result for SHA-256 d225e8e2ab36082e…

MALICIOUS

PDF

65.3 KB Created: 2021-03-03 16:50:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 92646081ab183be184fd05cdf5f4b269 SHA-1: 20c511131ee0aa42a4fd5353bc42e9fe02f3038a SHA-256: d225e8e2ab36082e3780f89cb49d2b388998c671f8c79572666969155ed12b56
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is highly indicative of a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains keywords related to a 'Troy bilt tb22 weed eater line replacement', suggesting a lure to entice users to click the malicious link. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

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://xajibur.ru/123?utm_term=troy+bilt+tb22+weed+eater+line+replacement
    • http://xoxuvajes.mywebcommunity.org/tie_rope_to_climbing_harness.pdf
    • http://zikewexer.scienceontheweb.net/wajozogutogamulavoregofo.pdf
    • https://static.s123-cdn-static.com/uploads/4473963/normal_5fc5acb5be6e2.pdf
    • http://retamos.mygamesonline.org/trombone_position_chart.pdf
    • http://braco.ru/25831119874m1u32.pdf
    • https://static.s123-cdn-static.com/uploads/4403260/normal_600574013c274.pdf
    • http://rixorevu.getenjoyment.net/medical_biochemistry_textbook_free_download.pdf
    • https://static.s123-cdn-static.com/uploads/4466166/normal_5fee8821c7dbc.pdf
    • https://cdn-cms.f-static.net/uploads/4414357/normal_60183dbadda26.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/lupebesu/21363113648.pdf
    • https://s3.amazonaws.com/fatikonavori/how_can_a_lion_protect_itself.pdf
    • https://s3.amazonaws.com/bufipevuril/88630458130.pdf
    • http://sadozejeko.myartsonline.com/2013_subaru_impreza_wrx_wheel_specs.pdf
    • http://vukejafuf.rf.gd/troubleshooting_kenmore_700_series_washer.pdf
    • http://bogalibamadom.myartsonline.com/1_centmetro_cbico_cuantos_mililitros_son.pdf
    • https://s3.amazonaws.com/zupenafud/bowflex_blaze_workout_guide.pdf
    • http://buwumipulufi.epizy.com/descriptive_text_structure.pdf
    • http://bawilifugoxak.epizy.com/vesuzosuwogoxo.pdf
    • https://s3.amazonaws.com/palevijuj/jujavipimepizip.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_off0000c427.bin
1b9f38d1e5e1ef75b31ab8cda76a674ef407979ff67a778cf18e03fc9dfc3c44
pdf-font-stream PDF embedded font (sfnt) at offset 0xC427 5456 bytes
font_01_sfnt_off0000d6b3.bin
3f078be8421ef80ec67bd612734ab8f7a6080078c95bd1da7943156cb7a8f16a
pdf-font-stream PDF embedded font (sfnt) at offset 0xD6B3 9828 bytes