Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2fb64a214c966a2…

MALICIOUS

PDF

87.4 KB Created: 2021-04-03 18:13:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a2c5ea2ac64828f3bd77f1b84b813adc SHA-1: 952ece82145c0f39d1f63e83619b1f57e8e45d84 SHA-256: f2fb64a214c966a24f875a2c1d75eede46c54044842d62b73c2a77846429c6c1
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are obfuscated or point to potentially malicious domains, as indicated by the PDF_SEO_LINK_FARM heuristic. The ClamAV detection and ML classifier also strongly suggest malicious intent. The primary malicious URL identified is https://lozipotod.ru/award?keyword=callback+function+in+c+pdf, which is likely used to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://lozipotod.ru/award?keyword=callback+function+in+c+pdf
    • http://kajuzumanaz.sportsontheweb.net/90586107318.pdf
    • https://cdn.sqhk.co/nuroteditu/9jibcvW/sefoto.pdf
    • https://cdn.sqhk.co/gunakawujo/FjiHwhf/vavejixen.pdf
    • https://cdn.sqhk.co/josozudibud/hVLibzg/75895832329.pdf
    • https://cdn-cms.f-static.net/uploads/4380078/normal_6009e0571253e.pdf
    • http://nopuvobetag.mygamesonline.org/64566750025.pdf
    • https://cdn-cms.f-static.net/uploads/4369173/normal_60219e1993ada.pdf
    • https://cdn.sqhk.co/zezoxomop/icibLKn/84420025989.pdf
    • https://cdn.sqhk.co/nimuxugemu/C0wegha/26294886184.pdf
    • https://static.s123-cdn-static.com/uploads/4401515/normal_5fddab41e4b7f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://1ceef7f3-d523-4f80-a0a4-3aed54d3d17a.filesusr.com/ugd/48841a_58c05b6c7c1040df9b5061c7a87f6355.pdf?index=true
    • http://wumekupewug.rf.gd/87330812946.pdf
    • http://wugerubuvugox.myartsonline.com/download_tabel_asmaul_husna_dan_artinya.pdf
    • http://nofadokar.rf.gd/jarimumapuzevasavobetan.pdf
    • http://kibululugavi.epizy.com/bhrashtachar_essay_in_marathi.pdf
    • https://393102e6-89af-4738-8cad-89662dba8dc5.filesusr.com/ugd/33a16d_16f6d504070c4a28a59cb8b44ceec510.pdf?index=true
    • http://wepuwuzuvam.epizy.com/8640468233.pdf
    • https://4c982f7a-b72b-446d-8c7a-5e2d6818c0db.filesusr.com/ugd/519a61_f4fc2fe4ffb24b119d713306234f1917.pdf?index=true
    • http://ruxemad.epizy.com/2017_cadillac_xt5_luxury_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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d27b.bin
a16d78b4e765d5ee2bbe34147faa0d9708ca9f4bd36cf3b090d8d65c0d41a973		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD27B 6548 bytes
font_01_sfnt_off0000e2d2.bin
f9e61eddd739cae6e616e7d479434fbc916e809d45405e34d0d388283436f94a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D2 4868 bytes
font_02_sfnt_off0000f362.bin
5bf5666ea36ee304b175e63dd37aa8676a37af5d66a35d0326c836aabe9ba4fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF362 3792 bytes
font_03_sfnt_off0001025a.bin
6f9ac5959002bec20f68837e45c76989ad0dade0e183a391e1cd3aeea4f15243		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1025A 11764 bytes
font_04_sfnt_off00012ad1.bin
d0f92f0d3afd91de2b5d4972e75baf45026a0f2537de5fd6351bb0a346150056		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12AD1 17460 bytes
font_05_sfnt_off000140f3.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x140F3 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.