Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c9e79dec607d338…

MALICIOUS

PDF

87.9 KB Created: 2021-03-02 16:10:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 981690662a5aaab5d19e0f8f67f3795c SHA-1: 883a59ad9db09f5c5c7392126c750123b44d6ae5 SHA-256: 5c9e79dec607d338bc0554372335ffd8852c3def47aeddba904f1c94b218fe29
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an external URI pointing to a suspicious domain, likely serving as a lure to a phishing or malware distribution site. The document body, though heavily obfuscated, appears to contain metadata related to the wkhtmltopdf tool and a search query, suggesting it's designed to trick users into clicking the embedded link. No scripts were extracted, but the presence of external URIs and the ML detection strongly suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/strik?utm_term=how+old+is+kaz+in+six+of+crows PDF link annotation
    • https://cdn.sqhk.co/lilomovetum/hehjjeK/jumble_classic_uclick.pdfIn PDF document text
    • http://torchqbfl.fun/speed_calculator_mb_sswexb.pdfIn PDF document text
    • http://pivojowemetobiv.mywebcommunity.org/7392132266.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453326/normal_603d8b822b471.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370054/normal_600ea632703ce.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389585/normal_5fcc82630f1eb.pdfIn PDF document text
    • https://cdn.sqhk.co/fujotojaxob/fhhpjdg/68515976838.pdfIn PDF document text
    • https://cdn.sqhk.co/jesovolavig/hXxVhbk/battle_of_saipan_1944.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381344/normal_601b2a0d3259b.pdfIn PDF document text
    • https://cdn.sqhk.co/xomakonezema/hf4rjca/xirof.pdfIn PDF document text
    • http://jusojixanona.getenjoyment.net/96864074334.pdfIn PDF document text
    • https://cdn.sqhk.co/xejudawadoni/hhagYib/57105834810.pdfIn PDF document text
    • https://cdn.sqhk.co/dobajinorite/jb8hbgf/fallout_shelter_mr_handy_die_in_wasteland.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402486/normal_5fcf92d2a135a.pdfIn PDF document text
    • https://cdn.sqhk.co/wixexozesila/jjcifZP/virtual_dj_mixer_for_android_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pikubub.onlinewebshop.net/samsung_grand_prime_pro_price_in_kenya.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010d0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D0D 5248 bytes
SHA-256: b9091a436fdd999218d0423ef24e26ff4fc5a95e6e992cde6aefb3ec854274b1
font_01_sfnt_off00011f19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F19 10592 bytes
SHA-256: 2917c251cdb5fe430e836d12fe76877511190f00882f8c933c3a73f0eb48904f
font_02_sfnt_off00014337.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14337 6084 bytes
SHA-256: 0bbd385887db5074fbd87256d70f98a882c9353f1362fd6c1377f0ce146e0394

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