Malicious PDF — malware analysis report

Static analysis result for SHA-256 27eae8a6d7972389…

MALICIOUS

PDF

84.1 KB Created: 2021-03-23 18:38:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 649d811f8f484979462c51628f85b1d5 SHA-1: 9fd588b5a66244a74b58e7529f8479d8fcfbbd13 SHA-256: 27eae8a6d797238926846c3670c6cdb68fb7e0bfba4a50d79eb8478c895f7037
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://soxebez.ru/123?utm_term=curriculum+vitae+samples+free++in+word PDF link annotation
    • https://balabirow.weebly.com/uploads/1/3/4/6/134690292/0b47e0068.pdfIn PDF document text
    • http://parrrtner.xyz/sony_a77_ii_datenblattnmq1l.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459170/normal_5fd82a5f1e458.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488815/normal_5ff8d783888b9.pdfIn PDF document text
    • http://naworigexoz.iblogger.org/95798443389.pdfIn PDF document text
    • http://kawonipedo.22web.org/23647393002.pdfIn PDF document text
    • http://cherrypimp.online/the_girl_you_left_behind_wikipedia0syei.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411273/normal_6048ed84c320f.pdfIn PDF document text
    • https://rilumegunelado.weebly.com/uploads/1/3/4/6/134615428/eab9b134.pdfIn PDF document text
    • https://poxedavuk.weebly.com/uploads/1/3/4/6/134608045/vegusijol.pdfIn PDF document text
    • http://haustova.com/16677452612wulc.pdfIn PDF document text
    • https://sikufotoxatufik.weebly.com/uploads/1/3/4/4/134458503/bowilux-nowefa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490739/normal_5fd5f5833762e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454988/normal_603000b590956.pdfIn PDF document text
    • http://fewomazojuxed.iblogger.org/15375968167.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://mezanemuwagoso.rf.gd/former_earlier_crossword_clue.pdfIn PDF document text
    • https://24451074-f53b-4065-993c-779ba3957988.filesusr.com/ugd/0ae25f_0f6b3cbbda034d2faf16720d7dea79ef.pdf?index=trueIn PDF document text
    • https://f653e438-ced9-461e-a5db-197b8397358f.filesusr.com/ugd/debdc1_cf019ca2f475487786d38132ae581edb.pdf?index=trueIn PDF document text
    • https://1ebfeea1-7d02-43b8-8f0a-002c87bc7f75.filesusr.com/ugd/50dcf6_845d2d285197493bbbb59fefc0bbf2f8.pdf?index=trueIn PDF document text
    • https://9a4b5e96-23fe-4021-9525-787506808755.filesusr.com/ugd/b3318b_d0f96bd55b104dc39333049e79bbf27a.pdf?index=trueIn PDF document text
    • https://1a9cd40a-f0d6-44d4-a143-19288280ca2b.filesusr.com/ugd/7a13df_bc7992d744a64f80b7c040c139a58330.pdf?index=trueIn PDF document text
    • http://mivenivanuzepa.epizy.com/is_rem_from_death_note_a_girl_or_boy.pdfIn PDF document text
    • https://df1882fa-13c5-42f1-8438-577935b594b9.filesusr.com/ugd/91932b_1adf8e4143444a0293745e14a99a4f84.pdf?index=trueIn PDF document text
    • https://b7eb3c74-9f10-4efd-a612-efb7ea03662f.filesusr.com/ugd/7198c1_13f2077551d94edd8054518b535f0514.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fdbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDBE 5360 bytes
SHA-256: 3e12e6c337229f6a23b677ef82fcee4c2c1636d7953ca964306d5db9eff4c6a7
font_01_sfnt_off00010ff0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FF0 10776 bytes
SHA-256: 3d2f983409177697ded04fafd48c118f9b07cf020a38898239f74e00c1c5d790
font_02_sfnt_off0001345a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1345A 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34