Malicious PDF — malware analysis report

Static analysis result for SHA-256 5645f359e0a55d6d…

MALICIOUS

PDF

82.1 KB Created: 2021-03-31 19:04:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 93155ccb0b2b0665d29fd603fb2557b0 SHA-1: 1d08826a7b870ed1032d2b64f35bbdf3456a6632 SHA-256: 5645f359e0a55d6dc98915d01b6c345ba6498ef66db15849c57609f002ae101d
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains an embedded URI pointing to 'https://jumiwimov.ru/wix?keyword=profit+first+summary+pdf', suggesting a phishing or malware distribution lure. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of common phishing techniques.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://jumiwimov.ru/wix?keyword=profit+first+summary+pdf
    • https://muwikilakejo.weebly.com/uploads/1/3/4/5/134519857/b084ef509fd.pdf
    • https://static.s123-cdn-static.com/uploads/4470553/normal_5fec77ba90d9b.pdf
    • https://cdn-cms.f-static.net/uploads/4369654/normal_60607bb67404e.pdf
    • https://famixarusefon.weebly.com/uploads/1/3/4/3/134396739/c667bdc0982.pdf
    • https://cdn-cms.f-static.net/uploads/4449004/normal_6062380a68bd4.pdf
    • https://setovejuno.weebly.com/uploads/1/3/2/6/132682792/dad75a.pdf
    • https://gavizixuf.weebly.com/uploads/1/3/5/3/135334805/92088f29ffc4c4c.pdf
    • http://magonimiw.iblogger.org/super_mario_sunshine_switch_gameplay.pdf
    • https://cdn-cms.f-static.net/uploads/4426088/normal_60406b68042dc.pdf
    • https://static.s123-cdn-static.com/uploads/4379969/normal_600073fccd8b1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://nodefojabotozij.rf.gd/star_sports_first_live_tv_app.pdf
    • https://s3.amazonaws.com/somisilegex/bagijavezu.pdf
    • https://uploads.strikinglycdn.com/files/d944060f-d0ee-4594-99b7-d4621a3eb011/what_setting_should_a_whirlpool_fridge_be_on.pdf
    • http://fevepapowiwed.epizy.com/52641060974.pdf
    • http://kogopixipinal.epizy.com/50885732898.pdf
    • http://zozemuki.rf.gd/81584613953.pdf
    • https://s3.amazonaws.com/fapaga/27000520467.pdf
    • https://s3.amazonaws.com/senodiw/bangla_cartoon_video_gaan_ing.pdf
    • https://s3.amazonaws.com/gomakobez/kopalarazexepipodugutum.pdf
    • https://uploads.strikinglycdn.com/files/8f876241-a44e-4e50-8675-d55735681c6a/samsung_55_4k_ultra_hd_smart_led-lcd_tv_review.pdf
    • https://uploads.strikinglycdn.com/files/40918cb9-752f-40f0-a36f-fdcbc39b8656/uses_of_nouns_worksheets_for_grade_6.pdf
    • https://uploads.strikinglycdn.com/files/fb309490-080f-4664-bd35-fa1283a46aea/garmin_watch_forerunner_110_manual.pdf
    • https://s3.amazonaws.com/zidenigad/financial_statements_template_excel.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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f19a.bin
a16d78b4e765d5ee2bbe34147faa0d9708ca9f4bd36cf3b090d8d65c0d41a973		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF19A 6548 bytes
font_01_sfnt_off000101f1.bin
d57c965abbdc0237595c2fa7f4748712a628a0576b96e36f93e329ba7c24c1ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101F1 5260 bytes
font_02_sfnt_off000113c3.bin
dcfc99d947818b6b5b01a5880775fa7b8338d523d431584641c7e7cd4fbe189d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x113C3 11040 bytes

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