Malicious PDF — malware analysis report

Static analysis result for SHA-256 afa8ab96fec7c38b…

MALICIOUS

PDF

84.1 KB Created: 2021-07-15 10:05:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d9d29eaf78e070697e6f2252c0636069 SHA-1: 1d0c67d763dfddb1e44420d3d5eabbd9e8206d65 SHA-256: afa8ab96fec7c38b4fc428e39d1256d1e48a0ea2e2274211650c5bbee034913f
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The presence of embedded URLs, although many are marked as benign, suggests an attempt to lure users to external resources. No scripts were extracted, but the PDF structure itself is indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://feedproxy.google.com/~r/sq/ugae/~3/9xivtwLAy4k/square?utm_term=thermodynamics+chemistry+notes+for+bsc+pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec90f98c19ad4998dc06eb/1626116346018/when_should_i_plant_turnips.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ed09c3b1b13d3c3c0d00ad/1626147267652/the_international_encyclopedia_of_intercultural_communication.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec927bc426b81e830127a4/1626116732115/obs_sync_video_and_audio.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e76bc6e4919b7a951adff2/1625779142628/natomofubef.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e7b28d80504e0a77672251/1625797261846/watch_sorry_to_bother_you_123movies.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60edae6042b2804958681bc3/1626189408225/our_lady_mother.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60efcaa6fdf1560143485771/1626327718168/first_page_in_apa_format.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60efd27ac57e07264c1f2ef4/1626329722651/164_cm_in_inches.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e7fd9569e16759cf7709b5/1625816469744/5408590332.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ee600f2a4cda17626047c6/1626234895122/qualcast_eclipse_320_lawnmower_manual.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e8ac9f171439398e0c379c/1625861279757/coolie_no_1_full_movie_download.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60edb2987d02012a36341fc9/1626190488357/49586661791.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ec9c55f4b4775d04a17607/1626119253587/58365285670.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e473.bin
bd6a808ceb85ebcc15c2a331ee74b141903b97d5dc2714e0b26658a26df04fd1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE473 17308 bytes
font_01_sfnt_off00011253.bin
eea47892db8c034e3c2a8f6eb6eaacab7371c111dfe07d20507053d5ec070ae9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11253 11056 bytes
font_02_sfnt_off00012bb8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12BB8 16792 bytes

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