Malicious PDF — malware analysis report

Static analysis result for SHA-256 c52859bbe86c0da7…

MALICIOUS

PDF

74.3 KB Created: 2021-03-13 12:57:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: fd27505c57ff52e065c9b41928e09ad7 SHA-1: 4ac7990606fa8c9f207db459da52fae46ccfe9c5 SHA-256: c52859bbe86c0da7366ec14621c20f76392861270ad1545c02aeca3da932cc18
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a URL that advertises a "Clash of Clans hack", suggesting a phishing or social engineering lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the presence of an external URI in a malicious PDF is a common technique for delivering further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://zajinet.ru/wix?keyword=clash+of+clans+hack+cydia+ios+12 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413567/normal_5fdbfd13ec802.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446635/normal_5fd1d8efdc2e5.pdfIn PDF document text
    • http://pekokaxa.22web.org/the_natural_way_to_draw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/41f8d316-0c65-418e-a97f-4f871a9400de/43840129349.pdfIn PDF document text
    • http://xikepidefam.epizy.com/37002333398.pdfIn PDF document text
    • http://mimodiko.epizy.com/sowuzutef.pdfIn PDF document text
    • http://julidami.rf.gd/what_math_is_on_the_sat_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ba0508b-47b0-4ece-a590-c0183b3960bf/irregular_verbs_worksheet_3rd_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/gurupixabogivaz/visual_studio_2015_professional_free_download_full_version_with_crack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bb44c3d-8d62-4862-a6fb-6cbd3706a2b1/lixen.pdfIn PDF document text
    • https://s3.amazonaws.com/bisazabe/soal_dan_pembahasan_bilangan_kompleks.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9b2b0cd-94b2-48ff-8440-29fadef24440/xezagujine.pdfIn PDF document text
    • https://s3.amazonaws.com/voxazedisula/paleontology_dictionary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ff49d9a-1564-4969-af03-35d2a724db1d/katie_horton_hears_a_who_voice_actor.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/beetalk_apk_versi_terbaru.pdfIn PDF document text
    • https://s3.amazonaws.com/telasebisu/fifty_shades_freed_full_movie_download_in_tamilyogi.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/78219268112.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_off0000e510.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE510 5268 bytes
SHA-256: b225ec61be79c20b4272dbfb22f8e4db8a2a75561af0acf1ca5c1f57e7b6fdf7
font_01_sfnt_off0000f709.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF709 11020 bytes
SHA-256: 2f60d7e7604ec3161cbdee26056b8dfceed0b7dc8ad6daf39748c78143559fe6

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