Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ce70bdccc1fdf4e…

MALICIOUS

PDF

67.3 KB Created: 2021-03-20 12:53:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f0b0d57cec9aeef53a276a2847b698c SHA-1: 9f8772a638dffc659f3255e5262d39eccdb4602f SHA-256: 2ce70bdccc1fdf4e95a902c0091dfcbac67650a78647f38e9ce1e82c6c015963
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, including a primary link to 'ponafet.ru' which appears to be part of an SEO link farm. The ClamAV detection and ML classifier strongly indicate malicious content, likely phishing or a trojan. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ponafet.ru/wix?keyword=the+resurrectionist+pdf+espa%25C3%25B1ol+gratis
    • https://cdn-cms.f-static.net/uploads/4479923/normal_60311a0b84cba.pdf
    • http://inostrana.com/proving_triangles_congruent_worksheet_kutajzspl.pdf
    • https://cdn-cms.f-static.net/uploads/4502436/normal_5fdc1b0daa5ee.pdf
    • http://itawegan.fun/diluvewapasopuv7ze3u.pdf
    • http://ses-sanobrabotka.ru/seth_net_worth_2019vqbev.pdf
    • http://gufelujoziwuki.iblogger.org/bangladesh_passport_renewal_application_form_dhaka.pdf
    • https://cdn-cms.f-static.net/uploads/4384320/normal_603200a8eb8a1.pdf
    • http://meetchambre.xyz/fefafekonepigorekalutawojlthon.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/882e1c74-56f7-458c-b8b0-43779f0cbc1b/25244663037.pdf
    • https://uploads.strikinglycdn.com/files/b8bf2c6b-267a-4981-87ec-2abd7ff89212/nuvuj.pdf
    • https://983c8978-ad56-435f-a988-47358aa6040c.filesusr.com/ugd/06a663_10df7eeb51554f938e84650bc872a93d.pdf?index=true
    • https://uploads.strikinglycdn.com/files/0b3fad2a-5529-48d3-96af-0a657346d02c/94188849100.pdf
    • https://uploads.strikinglycdn.com/files/3ca61993-9cdc-49b3-b7e5-277d1738f485/shark_rotator_powered_lift-away_truepet_bagless_vacuum_nv752_manual.pdf
    • https://uploads.strikinglycdn.com/files/49f497bf-cf82-48d7-99dc-397aaf5114ad/is_panda_express_orange_chicken_bad_for_you.pdf
    • http://jugibafamos.epizy.com/26533059090.pdf
    • https://6c473ef0-402e-45f0-9f95-6bc7e89a6a1a.filesusr.com/ugd/5518c3_90ff6fdcd8d54b66ab40fe9401ca5a51.pdf?index=true
    • https://7c5e2310-e79b-429e-9f4a-70471a43dcce.filesusr.com/ugd/8ec1ef_f07f0acd75624d7c9988451b26efa506.pdf?index=true
    • http://kudawugijamino.rf.gd/630774128.pdf
    • http://ridezosasi.epizy.com/sureweviderezixidulis.pdf
    • https://uploads.strikinglycdn.com/files/760b6ed3-9cfd-44f1-aecc-689505fab360/engineering_drawing_box_dimensions.pdf
    • http://pejezal.rf.gd/95825173645.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_off0000c710.bin
69d6febd73ffcdfc3dfe3bce849750c292fe7626b74f5e4ce41044e141af8bbe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC710 5576 bytes
font_01_sfnt_off0000d9c0.bin
6f94e310c2d72f5f61df21a4d0d5553aba1372ad5c9537b59e68050b7d91cb64		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C0 10584 bytes

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