Malicious PDF — malware analysis report

Static analysis result for SHA-256 1885ac5d8702f44a…

MALICIOUS

PDF

113.5 KB Created: 2021-04-06 21:46:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e561966f2a8d8d64ee3f681f2d25cad1 SHA-1: 72284d05e49deb89436f25cbe0884956d3c7eb5c SHA-256: 1885ac5d8702f44a94c22fcc0e4b134a2986c5b14725763a80c9d70da4a1e88e
96 Risk Score

Malware Insights

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

The file is a PDF containing obfuscated text that appears to be a lure for a 'Samsung galaxy play store apk' promotion. It includes an external URI pointing to 'https://bologen.ru/123?utm_term=samsung+galaxy+play+store+apk', which is highly suspicious and likely leads to a phishing site or malware download. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/123?utm_term=samsung+galaxy+play+store+apk
    • https://vaturelola.weebly.com/uploads/1/3/4/7/134704713/mupefuruf_gididufuri.pdf
    • http://dayzcommunity.info/64018557354o6i3e.pdf
    • https://junovolosexev.weebly.com/uploads/1/3/4/4/134467690/2f1b1b406b9cc75.pdf
    • https://cdn-cms.f-static.net/uploads/4446497/normal_601ec7d5c301d.pdf
    • http://igafnd.org/38598013897xmeu5.pdf
    • https://cdn-cms.f-static.net/uploads/4485926/normal_5fd114ca77f73.pdf
    • https://cdn-cms.f-static.net/uploads/4477376/normal_5fdc4d804364c.pdf
    • http://ogranicbio.fun/sub_zero_refrig_and_freezer5sas4.pdf
    • https://cdn-cms.f-static.net/uploads/4468871/normal_606292b5cf397.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/9deb7852-20e9-4486-a27d-17f9e2368f05/41204970258.pdf
    • https://s3.amazonaws.com/vesubodufisi/lifilawupedanesa.pdf
    • https://161abad2-7de2-49bb-9904-d6e2a620a662.filesusr.com/ugd/2eec94_8ddc97828fb44c12ae295d86a6137411.pdf?index=true
    • https://s3.amazonaws.com/dazuxujepov/matematica_financiera_que_es_valor_actual.pdf
    • https://s3.amazonaws.com/jenisozazewubo/14400930910.pdf
    • https://uploads.strikinglycdn.com/files/2d5a290e-d140-4916-9a6c-a164512ce118/89742886769.pdf
    • https://cf587a47-7c2f-4f55-8bbb-21a4c73503f7.filesusr.com/ugd/8ea597_bc10fff9506a47cbb572de8f25b7ae7a.pdf?index=true
    • https://uploads.strikinglycdn.com/files/8202c51f-16c4-42f0-bcd9-30d64dbfba3b/fundamentals_of_heat_and_mass_transfer_6th_edition_solution_manual.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://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001569c.bin
74dca2cfa10fa705508942bcb49d2fcdd858aa87907805ec893ded7264988c8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1569C 5312 bytes
font_01_sfnt_off0001689c.bin
cf6b3984f7443b62124e7e467c5e68468fc352058272134c84efe50d9f70ced4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1689C 12884 bytes
font_02_sfnt_off000193c1.bin
d1a84ba8f0e4a827a048d387db8dd5dae3538f1c7e72415b16af587a9947cdc7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x193C1 16060 bytes
font_03_sfnt_off0001a859.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A859 4324 bytes

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