Malicious PDF — malware analysis report

Static analysis result for SHA-256 054c35df2682f5f8…

MALICIOUS

PDF

88.0 KB Created: 2021-03-14 19:27:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 16d9db2dd07f552974531b20ee1916a9 SHA-1: 71a672c5d65cfba7d4a9071ed1ef382f3b6e5914 SHA-256: 054c35df2682f5f8d052ed640f887c165623af1005f046510947e7be51678048
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. An external URI, https://maypoin.ru/award?keyword=projet+les+7+merveilles+du+monde+pdf, was extracted, suggesting the document's purpose is to redirect the user to a potentially malicious site. The document body is heavily obfuscated and contains metadata indicating it was generated by wkhtmltopdf, which can be used to create malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://maypoin.ru/award?keyword=projet+les+7+merveilles+du+monde+pdf
    • https://static.s123-cdn-static.com/uploads/4421205/normal_5ff168373b714.pdf
    • http://ukranews.icu/dead_skin_cells_wikipediatpsrc.pdf
    • http://sopisafexuj.sportsontheweb.net/mexosokupinumus.pdf
    • https://cdn-cms.f-static.net/uploads/4417221/normal_5fdc70f51f1fd.pdf
    • https://cdn-cms.f-static.net/uploads/4389616/normal_601aa45cc4d6c.pdf
    • https://static.s123-cdn-static.com/uploads/4405925/normal_6005e828bc851.pdf
    • https://cdn-cms.f-static.net/uploads/4386622/normal_601ee5f65e632.pdf
    • https://cdn-cms.f-static.net/uploads/4463279/normal_6034038094441.pdf
    • https://cdn-cms.f-static.net/uploads/4480408/normal_6022c00fd2ae8.pdf
    • https://cdn-cms.f-static.net/uploads/4413982/normal_603954ee53f8f.pdf
    • http://luwinilulurop.mywebcommunity.org/46824347616.pdf
    • http://dududuw.mypressonline.com/what_factors_affect_human_taste_perception.pdf
    • http://skameyki.club/lambda_layers_performancey72ff.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/734fdea9-6b4d-4c78-bb1b-fae3af166dbc/dujinugadakupa.pdf
    • https://uploads.strikinglycdn.com/files/b63f127a-6cc0-42fc-9e0f-9813e0e0c1bb/reremurosizupevapazen.pdf
    • http://serefelotu.epizy.com/solutions_manual_to_accompany_linear_programming_and_network_flows.pdf
    • http://pebomotixot.myartsonline.com/rpg_maker_vx_ace_dlc_free_download.pdf
    • https://uploads.strikinglycdn.com/files/d3aef6f8-5c0a-4b6f-a7f7-9fc63914529a/aep_retirees_and_alumni.pdf
    • http://bupazomop.rf.gd/african_medicinal_plants.pdf
    • https://uploads.strikinglycdn.com/files/40f4f6e7-d27b-403b-ab71-982edb49e31b/how_to_make_drinking_soda_water_at_home.pdf
    • https://uploads.strikinglycdn.com/files/7469981c-3d14-4b3d-b42c-316b84f5cc52/how_to_compare_two_pieces_of_art.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_off0000f2d0.bin
35e2ba34a31e2251969afe2d91a691957a8df7c8b2e75aa800c1cc00baa1e304
pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D0 5076 bytes
font_01_sfnt_off00010411.bin
c770fd47163c40c8fc16b423effb9804cacc31f260da9255502781d0846e5647
pdf-font-stream PDF embedded font (sfnt) at offset 0x10411 13000 bytes
font_02_sfnt_off00012d0d.bin
e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15
pdf-font-stream PDF embedded font (sfnt) at offset 0x12D0D 16204 bytes
font_03_sfnt_off0001423b.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x1423B 4324 bytes