Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab765f5e48887fca…

MALICIOUS

PDF

84.3 KB Created: 2021-07-22 00:49:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f21c95e440457002261f53ebe26e9358 SHA-1: 7b0ba691a4427ec7b517d043a0318d0c7ebf312c SHA-256: ab765f5e48887fca3d3493d91f853543131ecc83b5a0e77a3894467dd4d3e7fc
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier and ClamAV detection strongly indicate maliciousness. The PDF contains embedded URLs, one of which is likely the primary lure for a phishing attack. While no scripts were explicitly extracted, the PDF structure and embedded content suggest it's designed to exploit vulnerabilities or trick the user into navigating to a malicious site.

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://feedproxy.google.com/~r/sq/ugae/~3/gPkW7oTCsL0/square?utm_term=solid+core+cable+vs+stranded+cable
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f414a0a9adb72803adf8fb/1626608800635/dal_course_selection.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f663c61138321192aeb4a3/1626760134871/safudupetizinilolazotumir.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f0ae8283d5aa155e7df249/1626386050629/dictionary_online.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f1c842465bb77bb64f7b2d/1626458178240/43180262792.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f030501e1a563dfb904bfe/1626353744571/66144681142.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f433d8730b252c881dfa50/1626616792810/53453591953.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ee4e2264675e3b9de26018/1626230306772/50259415177.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f22f70890fa5305bdb87b4/1626484592961/vifomuxawi.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f7039ed2d9a3445cbdf5cc/1626801055075/numerical_and_categorical_data.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f4a0805f13a15bd82da99f/1626644608712/9447825627.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60eda8c5c2b60e0ed5b5e333/1626187973598/tired_after_period.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f677d149ed543a17dbf626/1626765265709/good_luck_in_afrikaans.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e7aae795719b356d90472b/1625795303264/arm_sore_after_blood_work.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f4a04e689a653fd2a602a0/1626644558758/bsc_nursing_1st_year_anatomy_and_physiology_notes.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ec81ec402743737596583f/1626112492731/skid_and_pallet.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f264f0b84a576e6cf71d6a/1626498288556/60118699325.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f639eb357ac316222afec2/1626749420128/olympic_weightlifting_strength_program.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec91b7478ebe26bfc69bfa/1626116535313/motivational_words_for_girlfriend.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f02f2139c5d52effb8b9fa/1626353441897/rawamawukabaduwakok.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_off0000e77b.bin
dbe6ba9d2249e0e63b08efb10a84478eced1c219a7563b2ff1a9be786e03ccd5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE77B 16520 bytes
font_01_sfnt_off0001127c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1127C 16792 bytes
font_02_sfnt_off00012a93.bin
884e3f23a0eafa4028877fe7224e76d2dbe7bd909cceb759c1bfe47687379a28		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12A93 10644 bytes

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