Malicious PDF — malware analysis report

Static analysis result for SHA-256 9991e341cb92d254…

MALICIOUS

PDF

75.0 KB Created: 2021-03-24 14:23:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: daf42886077de5472b81bf4e7fe0aea6 SHA-1: 08d8407f14915fa901fd7d9632c5b55f273d0e02 SHA-256: 9991e341cb92d25443a033c5aba92357b91cd2fb1d39254dd73bb053444a1904
96 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 identified as a phishing trojan. It contains an embedded URL that masquerades as a search result, likely intended to direct the user to a phishing or malware distribution site. No scripts were extracted, but the presence of the malicious URL and the strong heuristic detections indicate a phishing 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://nipisod.ru/wix?keyword=trane+gas+furnace+specifications PDF link annotation
    • http://jusukigib.sportsontheweb.net/30_day_squat_challenge_for_beginners.pdfIn PDF document text
    • https://cdn.sqhk.co/goronikel/Igji2ic/sobebowe.pdfIn PDF document text
    • https://cdn.sqhk.co/wofikubid/jahawlK/movies_2020_release_august.pdfIn PDF document text
    • https://cdn.sqhk.co/bepemuno/Hcieehj/modern_age_furniture.pdfIn PDF document text
    • https://cdn.sqhk.co/tudobele/jxpihYg/guresefarezegasinem.pdfIn PDF document text
    • https://cdn.sqhk.co/mojazejo/8bK0dih/wisexajir.pdfIn PDF document text
    • https://cdn.sqhk.co/veleviziwew/TgdH5jb/break_down_synonym_dissect.pdfIn PDF document text
    • https://cdn.sqhk.co/ribovonubod/jbIq5hd/9066518353.pdfIn PDF document text
    • http://gapijet.scienceontheweb.net/amcas_applicant_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/rolidofajug/Xiii2EY/boomerang_cartoon_app_review.pdfIn PDF document text
    • http://zalixunepujo.22web.org/nezajiwenosufed.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bewexipobafuza.rf.gd/friedrich_nietzsche_-_on_truth_and_lies_in_a_nonmoral_sense_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/regufojalojaza/bbc_jersey_weather_report.pdfIn PDF document text
    • https://s3.amazonaws.com/biwubeleba/80364220367.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecce19f3-4910-46da-966f-2ad61089fe50/hieroglyphics_font_copy_and_paste.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/553a1e7e-6df3-4274-abdd-9d3ed959cc6e/tozal.pdfIn PDF document text
    • https://s3.amazonaws.com/lupebesu/report_lost_indian_passport_in_usa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/636ee7be-1e85-4c98-b1ae-37d39b29b2f7/13640311003.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ce5c916-e5ce-4381-90f3-ccaf965df296/menoseziritevesebuk.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/68056621300.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9DD 5100 bytes
SHA-256: b60083ce0bff355fa5e5f491558c833b3ca795624fbc73d32fefcc1c7b8d404c
font_01_sfnt_off0000fb4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB4F 10388 bytes
SHA-256: 975168adf261bce4131a2d00108d33cf410accbba7477a9637e86c5116f47b39

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