Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e40ec76d8ae6494…

MALICIOUS

PDF

89.8 KB Created: 2021-03-07 05:11:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: a19435adaaa680456f4ede3e6390ba65 SHA-1: 9aadecc2e08f8940c9b8b3e37eabe13b759748aa SHA-256: 7e40ec76d8ae6494ddd5abddc1bd384cfbcc01911b095f42e886f77ae52d8d35
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and a high ML score indicating maliciousness. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious classification. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware delivery attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 5

  • 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 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://pelibifir.ru/strik?utm_term=what+is+a+synonym+for+touchable PDF link annotation
    • http://tryraisins.pro/lochinvar_knight_boiler_parts_breakdown5msk8.pdfIn PDF document text
    • https://vuduzilir.weebly.com/uploads/1/3/1/8/131857383/2373020.pdfIn PDF document text
    • https://cdn.sqhk.co/semiwewedazi/hhjhOFk/banana_runtz_seeds_for_sale.pdfIn PDF document text
    • https://divaruwidis.weebly.com/uploads/1/3/4/0/134042650/torokupuzujud.pdfIn PDF document text
    • https://cdn.sqhk.co/pajokiman/iwhrStI/78807896939.pdfIn PDF document text
    • http://atomyimperial.ru/lg_tromm_dle8377wm_not_heatingodvnn.pdfIn PDF document text
    • http://nesobaka9.xyz/1097459455mzdal.pdfIn PDF document text
    • https://dalenorilesa.weebly.com/uploads/1/3/4/8/134858788/xurugonoka.pdfIn PDF document text
    • https://cdn.sqhk.co/raguwubives/fXgijeR/xevorubumukedufepop.pdfIn PDF document text
    • https://vowipolijej.weebly.com/uploads/1/3/4/7/134713390/debires.pdfIn PDF document text
    • http://pegajopakazo.22web.org/glasses_malone_2pac_must_die_video.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://balusazirifid.rf.gd/alquran_online_mp3_indonesia.pdfIn PDF document text
    • https://e05653fc-386e-4c8b-889d-738aee72c63e.filesusr.com/ugd/62421a_09df60e19bba4a6889faf85ff4ee2dea.pdf?index=trueIn PDF document text
    • http://guwibowo.rf.gd/xometupelumesixi.pdfIn PDF document text
    • http://sewegijod.rf.gd/lofikufamivugeximif.pdfIn PDF document text
    • http://jedirolin.rf.gd/63083237771.pdfIn PDF document text
    • https://8ab1a2d5-e5b1-44c5-a28c-e09959565f0d.filesusr.com/ugd/eb712c_36873ce63b0c45fd83f53e4995d5f2f4.pdf?index=trueIn PDF document text
    • http://ratesedefavure.epizy.com/jaguar_car_logo_free.pdfIn PDF document text
    • http://xupazegizijaniw.rf.gd/sazuze.pdfIn 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_009_off00013df8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x13DF8 17324 bytes
SHA-256: b39207700d7640fae5420e45f2f27a1fbfa75ff1f659180504418d101e75fb2f
font_00_sfnt_off0000d3df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3DF 3544 bytes
SHA-256: 30479c764b35e366d49c95bdbb27c0a4f4e68c43f32b5d06e0ca6285b8145904
font_01_sfnt_off0000e09a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE09A 5376 bytes
SHA-256: bbeb617604f4d718c740205e407f966eabc1f0378487c9f72521583fa660670a
font_02_sfnt_off0000f2ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2CA 2656 bytes
SHA-256: dbaab8dcf32bfe64cb008f34eb54f5316f62236e8dffe3de49b44225404383a5
font_03_sfnt_off0000fdce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDCE 2328 bytes
SHA-256: 864cbe2c6973b44d2b71e19ffbffb2328dcb3759b07ceb43c11d5a372fc4956d
font_04_sfnt_off00010884.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10884 2108 bytes
SHA-256: d117309382da938f7dffedc42f90dd4217b4d540d75629b80669d975ecbc171e
font_05_sfnt_off0001125a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1125A 13592 bytes
SHA-256: b35b1396ad873ad1c65a700ba02383fd4d54c3180bd52706ec810e53fd444b43