Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e200bf7a8a2d983…

MALICIOUS

PDF

91.1 KB Created: 2021-05-30 06:09:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e029db5c25f1d51cf8a2a17280b40393 SHA-1: 63cd28308f651b80d7469cba6d6cb65052012d27 SHA-256: 9e200bf7a8a2d9838282270b209380f8984aa2d670ec716c5bba62b4ce757530
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection to potentially malicious content. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. No scripts were extracted, and the document body was heavily obfuscated, preventing a more detailed analysis of the specific lure.

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-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://gufagopa.weebly.com/uploads/1/3/4/6/134660265/7733738.pdf
    • https://pegalidaxib.weebly.com/uploads/1/3/4/6/134632492/5081322.pdf
    • https://lopuvekire.weebly.com/uploads/1/3/0/8/130813144/fologixosag-raziduxado-powijuva.pdf
    • https://cdn-cms.f-static.net/uploads/4445889/normal_60385ea592bdb.pdf
    • https://perumazenete.weebly.com/uploads/1/3/4/3/134374831/b2d90361c2.pdf
    • https://static.s123-cdn-static.com/uploads/4406497/normal_5ffbb17577639.pdf
    • https://static.s123-cdn-static-d.com/uploads/4366045/normal_60b0080603d4e.pdf
    • https://bidopafogusiw.weebly.com/uploads/1/3/1/0/131070115/9290546.pdf
    • https://lijupumo.weebly.com/uploads/1/3/4/4/134496400/9284169.pdf
    • https://dujejasafat.weebly.com/uploads/1/3/0/7/130739214/3161177.pdf
    • https://xefavona.weebly.com/uploads/1/3/4/4/134463094/2476412.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://feedproxy.google.com/~r/wb/ENAH/~3/kMuynZNWtA0/wb?keyword=krav%20maga%20books%20free
    • https://uploads.strikinglycdn.com/files/fc1f28b4-3859-4be8-8140-083ad3754ed9/85405671555.pdf
    • https://uploads.strikinglycdn.com/files/b63b9e06-43c3-4f1d-9bb0-eafcb275771f/percy_jackson_sea_of_monsters_chapter_16_summary.pdf
    • https://uploads.strikinglycdn.com/files/d7f8b9d6-199f-47cc-805c-2ad3baf8efd1/63625995005.pdf
    • https://uploads.strikinglycdn.com/files/d00c47f2-c243-48f4-83a4-b4cea9834c4c/filoriranegik.pdf
    • https://uploads.strikinglycdn.com/files/925ac4b3-62bb-4ae9-9a85-0b05b8b03afb/logalexozibifosebu.pdf
    • https://uploads.strikinglycdn.com/files/dc26a42d-d803-4ad0-a9bc-7e1751c036cd/poxuxilukupikufisaros.pdf
    • https://uploads.strikinglycdn.com/files/97d615c9-e9de-4bb6-bcac-5901ee2c5287/rinnai_556f-510_electrode.pdf
    • https://uploads.strikinglycdn.com/files/4f3745e8-f1ec-4cad-919e-7f2f01c7276b/how_to_make_a_man_chase_you_psychology.pdf
    • https://uploads.strikinglycdn.com/files/5d096eff-c810-49fe-9376-14297943a290/medibesijowir.pdf
    • https://uploads.strikinglycdn.com/files/14ef9e27-2a44-485a-9d6c-bd0a15f340c0/child_support_phone_number_ga.pdf
    • https://uploads.strikinglycdn.com/files/e87cd978-0bf7-4c46-99db-bc7435573b46/diseccion_e_identificacion_anatomica_del_corazon.pdf
    • https://uploads.strikinglycdn.com/files/a13722cc-4729-4479-b74f-c67d64a081d6/71382000762.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011fe2.bin
e3b68b69aa158421d5e075823475444959ea801eafcc446eae0e381a2d1152ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11FE2 5288 bytes
font_01_sfnt_off000131d3.bin
8ad9bd72d4ddbff6a64dd8dfae9bfebf0ea280ef1765f59b2a39c3dba5e00c64		 pdf-font-stream PDF embedded font (sfnt) at offset 0x131D3 13240 bytes

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