Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bf2c6c1dbf238f6…

MALICIOUS

PDF

100.8 KB Created: 2021-07-22 10:37:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7306c29f5a6ea23bfc80b1c0bf1e61e1 SHA-1: faa410ce8f6cfd9a1e4b3487b0de0cd3ac05cf63 SHA-256: 6bf2c6c1dbf238f6a237c45083b25b19c2bfe6d1e76a68a6ac7254a102921760
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document flagged by ML classifiers and ClamAV as malicious. It contains multiple embedded URLs, one of which is identified as an external URI. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the detection suggest a phishing attempt, likely to lure users to malicious websites. The PDF structure also shows evidence of duplicate object bodies, which can be used to obfuscate malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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/~3/5VO7y1TeAqQ/square?utm_term=sublinear+function+example
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e8f2061448b06198468f47/1625879046662/mezibenodudixaxe.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f575ea6167905317f38edf/1626699242739/tokelogif.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f6184f028f4205a4b60dfc/1626740815929/chapter_wise_objective_questions_for_neet.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f08fc5bbc67365750b0090/1626378181627/zugafadosen.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec7714a3e9df788e6c1702/1626109716833/p0344_ford_f150.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f6987d79394e4d05b13b08/1626773629863/jenepiwazo.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f4d8721ad9bf1c32c60a78/1626658931045/italy_leaning_tower_of_pisa.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e7e009a431ed42d2fc20b3/1625808905876/fafuzokitu.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f6c5ae2a0863377a4b5e30/1626785198301/how_to_find_range_of_absolute_value_function.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f3ddc91d35070742243f6e/1626594761844/hunker_down_meaning.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f88cd165c5f3259d74f223/1626901714004/26118557602.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60edab7c151a035e9e7d30eb/1626188669214/63027590799.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f0ace9c1f62a45605d1a81/1626385641786/bedtime_for_four_year_old.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e821bf687a3d659a4ef215/1625825727319/clueless_full_movie_123movies.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f2f33c6d5e991e36db1446/1626534717105/types_of_strengths.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e94ea6c14ff043cd5e45f7/1625902758892/31914294209.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e9268ecc7c086459270a7b/1625892494276/can_we_see_who_viewed_your_instagram_profile.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f7551bf9dd84594d2a4258/1626821915785/86430335706.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f83006a0138f775ec00da9/1626877958544/5949241849.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e80ba4872c4c6263c6b6cc/1625820068681/82568645873.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e8c24661416537893ffbbb/1625866822475/annals_of_pde.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ee19dfb1dcdf258da532b1/1626216927917/independent_assortment_in_meiosis_definition.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_008_off000168a9.bin
54a71ee546316a72df0e16eef0b6943017632b9a0cb28f2d783dfc5aea376c69
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x168A9 17244 bytes
font_00_sfnt_off0000faaf.bin
3d5f5e00dfe22e1616a699aafb631b5cf60d32488e329a7ab4c35c821fed4da1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFAAF 10892 bytes
font_01_sfnt_off000113a7.bin
f21395ad6cc002630d9ae6e90bad1b77c6051f542214c29d5794588d5732b2fb
pdf-font-stream PDF embedded font (sfnt) at offset 0x113A7 2684 bytes
font_02_sfnt_off00011f16.bin
522188dff3fd0abb24b05e0fd6c95c3c31909ff0f6fc916fb9f43f817efa2988
pdf-font-stream PDF embedded font (sfnt) at offset 0x11F16 19272 bytes
font_03_sfnt_off00015098.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x15098 16792 bytes