Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3ca88548e1976e6…

MALICIOUS

PDF

117.7 KB Created: 2021-07-23 13:57:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 620d0ea0d49a441dffe1f0951de51811 SHA-1: 973730fa18ae3c59615886b4eeddfaaee7609a19 SHA-256: f3ca88548e1976e67de231654ffe59758002e15ffc4074eeb757368457ec27f2
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded URLs, although many are marked as benign, suggests an attempt to redirect the user to external content. The PDF structure and embedded objects are consistent with phishing or malware delivery techniques.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://feedproxy.google.com/~r/sq/ugae/~3/X6hrLWyzjlw/square?utm_term=selection+in+hrm+pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f07ce51e6fa57ab572d267/1626373349700/98028037842.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60edba9b77d6f70fe3a2fda1/1626192540081/34403503265.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f6e52c222b226525b9bd18/1626793260649/jay_r_and_mica.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f07613d8d49b3972724ba0/1626371603906/67368011264.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f2ba93860d895b48206996/1626520211627/76519742055.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f8a39cd35d04529b272aab/1626907548923/bizanawomidezabak.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ee0992aa539923b5820ea3/1626212754618/75225675180.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f7f71153df297156b76e7d/1626863377310/fajarofiv.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f2201dfe2aa53669010ae0/1626480669534/best_ide_for_data_science.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f62cd02e93dc7e95b41481/1626746064427/46970796355.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e847b3da9c5376a3b7669a/1625835443503/558263871.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ee14d2df3d323292cd7b39/1626215634782/sexolowilulojaxixo.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f3debf6f491d4a1ff70155/1626595007908/network_design_issues.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f9a45a456afe2288c6a3b4/1626973274921/night_by_elie_wiesel_questions_and_answers_chapter_5.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f53fa57121636e99b785c0/1626685349546/2_guys_grill.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f0b859c08012782f7a3e67/1626388569222/business_administration_objective_for_resume.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f1240f9b6f23611956a267/1626416143772/how_to_gift_skins_in_fortnite_chapter_2.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f311f922602c08caecbc95/1626542585644/88503905327.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_off00016ac5.bin
4736bbb10affa3a88756ce16716be2dc034756ef22c2a3c2dc8f749a49c0e922		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16AC5 10632 bytes
font_01_sfnt_off000182d1.bin
e7fa3361bbd955b95d8da5bbbe879d0f4db2f96e545d6ba23aa3284695893772		 pdf-font-stream PDF embedded font (sfnt) at offset 0x182D1 17404 bytes
font_02_sfnt_off0001b02d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B02D 16792 bytes

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