Malicious PDF — malware analysis report

Static analysis result for SHA-256 117c78dc9ac18577…

MALICIOUS

PDF

71.6 KB Created: 2021-03-17 02:08:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bce00ef0464824ae1684bd11c69ceb73 SHA-1: 593a020128cd956bcd468730eb95459304b8600b SHA-256: 117c78dc9ac185779809d68b0cf3f4d68858b97b8daa4d4b15b78431a5a1fc5d
104 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The presence of an external URI pointing to 'soxebez.ru' and the heuristic indicating urgency lures suggest the document is designed to trick the user into clicking a malicious link. Although no scripts were explicitly extracted, the PDF format itself can embed JavaScript, which is often used for malicious redirection or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://soxebez.ru/strik?utm_term=samsung+un55d6000+power+supply+board
    • http://gopadaxin.mywebcommunity.org/77845018475.pdf
    • https://cdn-cms.f-static.net/uploads/4481067/normal_603aa51278518.pdf
    • https://static.s123-cdn-static.com/uploads/4408596/normal_5fe25c1c49fb0.pdf
    • https://cdn-cms.f-static.net/uploads/4422180/normal_604396a474091.pdf
    • https://cdn-cms.f-static.net/uploads/4501360/normal_600f47a195a8c.pdf
    • https://cdn-cms.f-static.net/uploads/4403421/normal_604a3fe502da9.pdf
    • https://cdn-cms.f-static.net/uploads/4487206/normal_600ca57749feb.pdf
    • https://cdn-cms.f-static.net/uploads/4401711/normal_6050240af3ebb.pdf
    • http://zedateve.mypressonline.com/tascam_dp-008ex_best_price.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tobaziw/agnathavasi_movie_bgm_free.pdf
    • http://kesobiw.rf.gd/69135001550.pdf
    • https://s3.amazonaws.com/satuja/zalinovenazutobuzulabowup.pdf
    • http://suvumudupese.epizy.com/nefivalimitamomeguvulez.pdf
    • https://uploads.strikinglycdn.com/files/c9f3de7d-ac42-4451-8e18-02702d6d154b/48803570231.pdf
    • http://manuwakagekewu.onlinewebshop.net/midi_to_sheet_music_musescore.pdf
    • https://s3.amazonaws.com/leributafa/56416611881.pdf
    • https://uploads.strikinglycdn.com/files/211d5dca-9ec7-4914-b2f7-be32e2c4b009/the_chronicles_of_narnia_the_lion_the_witch_and_the_wardrobe_full_movie_google_drive.pdf
    • https://uploads.strikinglycdn.com/files/1eaf3b61-ff8a-4e1a-961e-70440fe709d1/how_portable_dishwasher_hook_up.pdf
    • https://uploads.strikinglycdn.com/files/6905c0f2-ab6f-41c1-8a14-1bcbba2c4c70/69270911146.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_off0000d6c7.bin
ef4a3de115da403e5d579ac0737a66e419dce1a7269eb7d1bf8e9ba44d1be853		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD6C7 6136 bytes
font_01_sfnt_off0000eb94.bin
806240fa589cd73e1fe7f039588436479564aa626708c8adff5f9029fa0dacb8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB94 11140 bytes

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