Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7be6a556fdcdafa…

MALICIOUS

PDF

87.2 KB Created: 2021-03-19 19:36:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 699019dad735d3c5d19d5ce72677e171 SHA-1: 5918217ea882b351686926367feeac5f9dfe72bc SHA-256: e7be6a556fdcdafab7d46dcc47358fba97d72589db4cd3c2e8f65215857c04ce
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 0.9989

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/wix?keyword=mi40+printable+workout+sheets+pdf PDF link annotation
    • https://zokaguwozan.weebly.com/uploads/1/3/0/7/130738936/farezitilebix-zuvisamuregedoj-risoletus-pepudalazefilat.pdfIn PDF document text
    • http://vawokupe.iblogger.org/funotodabigadusatoxobiber.pdfIn PDF document text
    • https://bigorofepomibed.weebly.com/uploads/1/3/4/4/134400252/e6a73abbeb5.pdfIn PDF document text
    • http://xowivek.iblogger.org/89231050387.pdfIn PDF document text
    • https://dodesagetulisuv.weebly.com/uploads/1/3/4/9/134902864/gasax.pdfIn PDF document text
    • https://fovodonote.weebly.com/uploads/1/3/2/7/132740633/duzokuxazazem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463788/normal_601960cf37d4d.pdfIn PDF document text
    • https://vivuguduwidu.weebly.com/uploads/1/3/2/6/132681484/9858793.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375704/normal_600870bb80c2e.pdfIn PDF document text
    • http://reveruxoxobeve.22web.org/ukulele_beginner_guide.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455387/normal_5ffde0c6cf088.pdfIn PDF document text
    • https://laxefepi.weebly.com/uploads/1/3/4/5/134528647/tidasijarerer_tometonenafel.pdfIn PDF document text
    • https://fitikuwez.weebly.com/uploads/1/3/2/6/132681307/bixasoxun.pdfIn PDF document text
    • http://wogivodugakovek.mygamesonline.org/24926657096.pdfIn PDF document text
    • https://mujesazuf.weebly.com/uploads/1/3/2/3/132302915/wibiwopokimojip.pdfIn PDF document text
    • http://pitukegurajokup.22web.org/software_blender_full_crack.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375909/normal_5ffc6e4c0c029.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
    • https://0443db59-9f9d-4031-b786-8a5723798135.filesusr.com/ugd/ab62d6_09c2f9ee095f4b5283d09fe4e37affe2.pdf?index=trueIn PDF document text
    • https://dc273c12-e125-4738-b2e6-b96bc4bd5eb7.filesusr.com/ugd/c8df25_7f245b4717f74cb2952bb5b4732c9fe1.pdf?index=trueIn PDF document text
    • http://sojusenetuki.onlinewebshop.net/837596860.pdfIn PDF document text
    • http://jiwodiw.myartsonline.com/90630933380.pdfIn PDF document text
    • https://d3df31c7-72fe-42b1-a92e-0723e8ed7a16.filesusr.com/ugd/5bf82b_b72e323e72ec45ab9e390e7283c0caf4.pdf?index=trueIn PDF document text
    • http://xopemaw.rf.gd/courier_boy_songs_naa_songs.pdfIn PDF document text
    • https://85fc0914-20e3-4f1c-be8c-de7e6f89f47e.filesusr.com/ugd/a44510_6227136440bb409c83ac3154be81d26f.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_off0001056d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1056D 5544 bytes
SHA-256: 512521eff3996741dcb83d076c66bf45e85485ffa8501160e4a5345da20241c0
font_01_sfnt_off00011845.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11845 11444 bytes
SHA-256: 099a1a2bf473284cd80562507e30219cd0b803ef6c075408b5eae4411899ee91
font_02_sfnt_off00013f5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F5D 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333