Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a8f4dcecf631a6d…

MALICIOUS

PDF

79.3 KB Created: 2021-03-21 22:04:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: f03917e9a52bed5b5b645471345f8bb8 SHA-1: 8b7568ddf8c0a5640c7bd21a12b49ea8f7897d2e SHA-256: 3a8f4dcecf631a6d36931a5d96bd3cac6011907243e76678df1f60e7485ba39a
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation scheme. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://kuzutuzo.ru/wix?keyword=minecraft+the+end+is+extremely+nigh PDF link annotation
    • https://kezofufilulo.weebly.com/uploads/1/3/4/4/134488682/3516128.pdfIn PDF document text
    • http://shtangye.xyz/5071828409924jg0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485162/normal_602d6b106cc99.pdfIn PDF document text
    • https://xijapesulole.weebly.com/uploads/1/3/4/5/134588017/09ea35a13eb.pdfIn PDF document text
    • https://tibulewozimok.weebly.com/uploads/1/3/4/0/134017320/basununekaga.pdfIn PDF document text
    • http://natikolom.site/45622380350t2rcj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421462/normal_603cae86890fc.pdfIn PDF document text
    • https://larekupexog.weebly.com/uploads/1/3/4/8/134884129/vorateraxuximiv.pdfIn PDF document text
    • https://fimezerix.weebly.com/uploads/1/3/4/4/134478386/xorolobegepimoz-bidabadokigus-robelujinofev-sudize.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377381/normal_60001f7428a88.pdfIn PDF document text
    • https://werevofapopaja.weebly.com/uploads/1/3/4/4/134492388/jaladuditife.pdfIn PDF document text
    • https://zoxujaratufopa.weebly.com/uploads/1/3/5/3/135399722/f33c258f21d1e.pdfIn PDF document text
    • http://liketsven.xyz/recipe_cost_calculator_excel_spreadsheetqcbya.pdfIn PDF document text
    • https://letotanuvimipe.weebly.com/uploads/1/3/4/5/134598603/2763927.pdfIn PDF document text
    • https://torimavilok.weebly.com/uploads/1/3/5/9/135984964/guwuvuvoxejetedofa.pdfIn PDF document text
    • https://defuzeje.weebly.com/uploads/1/3/4/8/134883556/6546538.pdfIn PDF document text
    • https://kebumemimax.weebly.com/uploads/1/3/1/6/131636814/6774667.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455907/normal_5fd67f91d2546.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483346/normal_60348c5e51460.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://uploads.strikinglycdn.com/files/044d1da3-1afd-44a4-a10f-cb3a6ca855e4/89485057653.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4debaa05-83d0-4652-ac42-4bc220642a64/1177149740.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd0da374-e0bc-4d4e-82fa-abafbdbfb428/projector_light_blast_precio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3c8c1a7-ff78-4bdc-8088-23470aa58a4c/is_junie_b_jones_dead.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://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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4FA 5288 bytes
SHA-256: 8e31623196126823d4eb9ebe5ad35e73ea5dd19dca415a3aaa1b02ded645c1e7
font_01_sfnt_off0000e6cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6CF 10464 bytes
SHA-256: 0d3b2c300564a482126048a4e5032acf3d00a53db79a487ed33ca4f2ee66e880
font_02_sfnt_off00010afc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AFC 16064 bytes
SHA-256: f7fb55aa7df24da556f1e6a14ff3e973b5c7274e6851c040e899454d18355684
font_03_sfnt_off00011f90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F90 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

Open this report in the interactive analyzer, or submit your own file for analysis.