Malicious PDF — malware analysis report

Static analysis result for SHA-256 d757b720886c680c…

MALICIOUS

PDF

72.6 KB Created: 2021-02-27 09:58:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: a04a64b529fd6c5e9ee3de5df6f44a8d SHA-1: 372e95bfb17d58591340b38ec9807dd009785ddd SHA-256: d757b720886c680c276d9f3328526157535236485a5d524ea7d22bef87479714
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wix?keyword=what%2527s+after+million+billion+trillion In PDF document text
    • https://denutuzuno.weebly.com/uploads/1/3/4/7/134706868/nixagawuwuneku_norokupizanir_zuxumunogilarab_wogubuvuz.pdfIn PDF document text
    • http://pipvip.ru/autocad_2015_64_bit_keygen_free70d81.pdfIn PDF document text
    • http://xulubapatoso.scienceontheweb.net/kant_critique_of_practical_reason_cambridge.pdfIn PDF document text
    • http://unonatur.space/crochet_pattern_for_basic_hatuvobb.pdfIn PDF document text
    • http://bemijaragilez.22web.org/75482475124.pdfIn PDF document text
    • https://rigefenasoje.weebly.com/uploads/1/3/0/7/130776330/1361786.pdfIn PDF document text
    • http://reliables.ru/fusiboxod6r2v.pdfIn PDF document text
    • http://mkr-olimp.info/free_offline_games_for_kids_no_downloadcuaoz.pdfIn PDF document text
    • https://rutejiredoratel.weebly.com/uploads/1/3/1/3/131383841/8478244.pdfIn PDF document text
    • https://xogoluxoso.weebly.com/uploads/1/3/4/4/134444279/gejurebuzexe_besodel_pusekir_vuxopufot.pdfIn PDF document text
    • https://vigobekopu.weebly.com/uploads/1/3/2/3/132302998/6945826.pdfIn PDF document text
    • https://watowerapomos.weebly.com/uploads/1/3/0/7/130775357/bodiwo-wibofovirem-viron.pdfIn PDF document text
    • http://xemizawufogutuf.scienceontheweb.net/paxomepogemuxugojo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFBC 5192 bytes
SHA-256: 41238d95d61f106b1d5a81fb552b0462b46f51a94430e035b40bb6d0add6af92
font_01_sfnt_off0000f14d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF14D 10524 bytes
SHA-256: 2eb4d94b25e901dbf5f70e55300fc1aeee8a71e51e3fb69bad2e9c01017f37d8