Malicious PDF — malware analysis report

Static analysis result for SHA-256 66051c69484e80d3…

MALICIOUS

PDF

79.6 KB Created: 2021-03-20 06:13:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 50b2d67e0558f2b516213d07a002e8eb SHA-1: 03ba7dc13b0156d508a2031344e1f230f3cc1703 SHA-256: 66051c69484e80d3a095064e48a903e52105ff98a6bb2e76b3bd08057b454a4c
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, 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. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to trick the user into visiting a compromised resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://midufefew.ru/strik?utm_term=best+hunter+dps+bfa PDF link annotation
    • http://thecet.xyz/ribiwefikamejivirexar6opf.pdfIn PDF document text
    • https://cdn.sqhk.co/vekuperik/djfPPji/after_burner_climax_ps3_pkg.pdfIn PDF document text
    • http://nejevefivi.mypressonline.com/jobajo.pdfIn PDF document text
    • http://cosmicgig.com/how_to_turn_off_american_messaging_pagerisdc2.pdfIn PDF document text
    • http://wivikaxebox.medianewsonline.com/abbyy_finereader_birletirme.pdfIn PDF document text
    • https://cdn.sqhk.co/pigevikuwi/jggj4XB/wokefulijipavomugikiruxok.pdfIn PDF document text
    • http://yarrebitteh.online/rawobuvasajewbmtis.pdfIn PDF document text
    • http://vatetuda.scienceontheweb.net/analog_science_fiction_and_fact.pdfIn PDF document text
    • https://cdn.sqhk.co/gukugifixija/ijER8ib/62185162237.pdfIn PDF document text
    • https://cdn.sqhk.co/rasidepad/aicYjiG/67227465738.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8316a071-1c81-4729-bbc9-bb84f51c1359.filesusr.com/ugd/b2ba6b_788c9dea7b274443b5f7326934592350.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wupagivoz/shards_of_the_exalted_dream_burn_legend.pdfIn PDF document text
    • https://f13dd0f9-fe0a-4257-a88d-d9af1a1cf0e3.filesusr.com/ugd/d954c5_a0aa8004bb8548d7aee732ab9015f09a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/hill_climb_racing_games_apkpure.pdfIn PDF document text
    • https://b03e51a8-7171-48c0-94d6-e4c032e6f37f.filesusr.com/ugd/9421c8_2e2c279fea0548b3a9d6f4c25188a749.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/cisco_jabber_for_windows_admin_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/pobixedele/childrens_sewing_patterns_for_beginners_uk.pdfIn PDF document text
    • https://e0220c8c-c322-4c33-af83-7c5b0fe00b66.filesusr.com/ugd/a771bd_9498d53dc23f45e78a3e4299a266481a.pdf?index=trueIn PDF document text
    • http://kilarosine.atwebpages.com/funes_dos_anticorpos.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e166.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE166 5288 bytes
SHA-256: 1687bb285c4df72c22c3faff4ae41be1a7d4e915cb4a6decc21a9b319644f088
font_01_sfnt_off0000f352.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF352 10940 bytes
SHA-256: e1750c6b63b47a5d4b2b5090cc2902166c1218200446b456d91442b26e4b6666
font_02_sfnt_off000118ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118BA 17008 bytes
SHA-256: d895bab9f776aa86f0689c0e3f61053341192224587ce8bd0eeb651dd0ff780e

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