Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ed915a7400e8e53…

MALICIOUS

PDF

90.2 KB Created: 2021-05-03 21:52:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 367fdf39d602a8fa2b1b803671886238 SHA-1: 60026ce0347f1057006286e0bf04292c80f59a8d SHA-256: 9ed915a7400e8e53e549a301d9e5de07d88c6505cf90964508f1bcca21b9eaf9
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting it's part of a link farm designed to drive traffic to potentially malicious sites. The document body, though heavily obfuscated, contains a URL that appears to be a lure for users seeking information on refrigerator repair.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://botokaw.ru/strik?utm_term=how+to+reset+a+norcold+camper+refrigerator PDF link annotation
    • http://fawikenaxalu.scienceontheweb.net/dell_vj4yx_rev_a00_specs.pdfIn PDF document text
    • https://manabuvajej.weebly.com/uploads/1/3/4/8/134847277/pavemivip-tugakivezanov-kunewovosew-xuxajufikud.pdfIn PDF document text
    • https://fadurobudafeme.weebly.com/uploads/1/3/5/9/135959894/7737658.pdfIn PDF document text
    • https://lujuvikib.weebly.com/uploads/1/3/1/4/131406806/zegasuweg.pdfIn PDF document text
    • https://wixilasiniwib.weebly.com/uploads/1/3/1/1/131163505/5026448.pdfIn PDF document text
    • https://papuwupiruji.weebly.com/uploads/1/3/4/3/134348025/7dbd4c1b7.pdfIn PDF document text
    • https://wutupebepa.weebly.com/uploads/1/3/3/9/133997315/1944931.pdfIn PDF document text
    • https://xowogibudul.weebly.com/uploads/1/3/4/4/134446034/rakud-xatofu.pdfIn PDF document text
    • https://zebonusifok.weebly.com/uploads/1/3/4/5/134509505/6648978.pdfIn PDF document text
    • http://veruvipavopa.getenjoyment.net/94149097364.pdfIn PDF document text
    • http://fadewujetenuve.mywebcommunity.org/accounting_standards_9.pdfIn PDF document text
    • https://mezuxanivatanid.weebly.com/uploads/1/3/4/4/134499991/4660240.pdfIn PDF document text
    • https://sakojokotinij.weebly.com/uploads/1/3/1/3/131379540/dilowu_gejipulewoj_sitakanelatop.pdfIn PDF document text
    • http://bumefivaloso.scienceontheweb.net/sigukidepune.pdfIn PDF document text
    • https://gorasugaki.weebly.com/uploads/1/3/4/7/134766712/449029c372c28.pdfIn PDF document text
    • https://zexaloguf.weebly.com/uploads/1/3/4/5/134576330/pavupapubu-lapazobuke-guguletajo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://03df18d0-0a94-4077-8b44-1f3cf8b7c870.filesusr.com/ugd/23a6c3_abad96046d6040f4a66c239275d1a8a2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/545f5e55-5885-4455-a9a5-ac8723bfff0f/zaduwabejarimetavisato.pdfIn PDF document text
    • https://4fbc56e1-d9a2-4996-be1d-38f9cd263936.filesusr.com/ugd/b1afee_74f9ac90e0744fe18784093ae2a4bd73.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/155ec72e-5cdd-4652-abda-a31fee40c98a/liars_dice_simple_rules.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/122a3558-ad7d-4293-82a7-08cda19b0c11/briggs_and_stratton_450_series_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f55be926-9593-424c-b306-e70cd4a1ef42/famodoxopaladakezidot.pdfIn PDF document text
    • http://gixarewujedel.atwebpages.com/kebufikisesi.pdfIn PDF document text
    • https://87b84290-c0b3-4c73-97a1-3d59c64c3f69.filesusr.com/ugd/c638b7_2df040effa074f35af4d35d9d46cc1ba.pdf?index=trueIn PDF document text
    • https://1a6c606f-1efd-495f-9370-57f425d809fd.filesusr.com/ugd/1be480_76b0a44ee3eb44d8a451a294baea5b98.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010c17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C17 5528 bytes
SHA-256: f4ab4df9f2dc1652ebf1228e60b84853f33dc9abd292fff34dafbca5e4100182
font_01_sfnt_off00011edd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EDD 11260 bytes
SHA-256: bd56e38004c6ae9aabcf5915abeb00835dc85cb16058be552fb78f5559f98ccb
font_02_sfnt_off000144ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144EF 16344 bytes
SHA-256: 7e0863d6dcdfe3ce59f67395a06e5e8634226e44f713773c85e494ff6d119ee1