Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb7c1fbc4ac7e2b4…

MALICIOUS

PDF

91.6 KB Created: 2021-03-16 19:29:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e433e88583160ece6ea68c813bcddf2e SHA-1: 7f6b19ff585f36db21e137f20d8e2bfa100ac78a SHA-256: eb7c1fbc4ac7e2b406d227a419db25568d5b7729b972601733b31194bb78336c
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, suggests a lure related to 'Abelmoschus esculentus medicinal uses'. No scripts were extracted, but the presence of external URIs and the malware detection strongly indicate a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://druttle.ru/123?utm_term=abelmoschus+esculentus+medicinal+uses+pdf
    • https://cdn-cms.f-static.net/uploads/4419452/normal_602bdbeab4fbf.pdf
    • https://cdn.sqhk.co/kulabokirow/593hbup/bike_games_for_keypad_mobile.pdf
    • https://cdn.sqhk.co/nosimasiv/hcKVfgj/online_mobile_recharge_vodafone_sms_pack.pdf
    • https://static.s123-cdn-static.com/uploads/4445573/normal_5fdccf9cc1827.pdf
    • https://static.s123-cdn-static.com/uploads/4413966/normal_5fc7e946aeb92.pdf
    • https://cdn.sqhk.co/nufopusifa/ahj2idF/53913085234.pdf
    • https://static.s123-cdn-static.com/uploads/4366668/normal_5fc730c7b7dba.pdf
    • https://cdn.sqhk.co/veludewozen/jc0XjiD/93371114945.pdf
    • https://static.s123-cdn-static.com/uploads/4467286/normal_5fc9861a940d1.pdf
    • https://static.s123-cdn-static.com/uploads/4417040/normal_5fee650e2ff6a.pdf
    • https://cdn-cms.f-static.net/uploads/4387565/normal_603579f4039c9.pdf
    • https://cdn.sqhk.co/tiwefuxab/bIOyGDo/lucky_block_mod_1._8_9_addons.pdf
    • https://cdn.sqhk.co/gasukatebu/ajeKz5v/avast_antivirus_offline_software_free.pdf
    • http://timujegewaverun.22web.org/leiningen_versus_the_ants_study_guide_answers.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/f96873ae-0c65-404d-91f8-59f8664922a8/fimatowukefolulobulome.pdf
    • http://vigevelo.rf.gd/learning_how_to_write_arabic.pdf
    • http://pevoxino.epizy.com/35158464766.pdf
    • https://uploads.strikinglycdn.com/files/250acf9a-da2f-48a1-9887-cb5570e4aebf/10717018795.pdf
    • http://riremim.rf.gd/android_google_maps_api_key_release.pdf
    • https://uploads.strikinglycdn.com/files/015d91a6-9bea-4722-9c2b-cb620f62c6ae/mumara.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_off00011ab4.bin
a656bc2988ed99b3f2c03e9d0738b76e19400c6013eec59e580fca85ff198de9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11AB4 5308 bytes
font_01_sfnt_off00012c9b.bin
c43b54ae36b107a60292b4b85f5079948e49247b4e30d048c0434f0280b1f60e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12C9B 11208 bytes
font_02_sfnt_off000152dc.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x152DC 4324 bytes

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