Malicious PDF — malware analysis report

Static analysis result for SHA-256 95dd7e1ecce44c65…

MALICIOUS

PDF

79.1 KB Created: 2021-03-15 11:40:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: c5f83a9ef6d9476b24b21a991a78b5fa SHA-1: d19bdf2b9af23e30284c93332d6ed8d55262d1e2 SHA-256: 95dd7e1ecce44c65d626021e2632a65154722f2e1cd178a40d5de89fa0de532b
186 Risk Score

Malware Insights

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

This PDF file was identified 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 a link farm or SEO spam operation. The primary URL, 'https://ponafet.ru/award?keyword=procesos+de+la+industria+alimentaria+pdf', is likely part of this scheme to drive traffic to potentially malicious sites.

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
  • 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://ponafet.ru/award?keyword=procesos+de+la+industria+alimentaria+pdf PDF link annotation
    • https://cdn.sqhk.co/rojarasam/jfetjhT/zurizepekawowi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450417/normal_5fe2d53589a6b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372101/normal_5fd8742201966.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485828/normal_601082738be41.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384152/normal_60144f95633cc.pdfIn PDF document text
    • https://gawozigojuvapa.weebly.com/uploads/1/3/4/8/134896601/b42fc.pdfIn PDF document text
    • https://gojenejanoz.weebly.com/uploads/1/3/0/7/130739654/4147789.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458615/normal_5ff7abc18ca4a.pdfIn PDF document text
    • https://vuxulirupam.weebly.com/uploads/1/3/5/3/135346280/risinaxusafa.pdfIn PDF document text
    • https://cdn.sqhk.co/tukutabu/bjxbnAr/yellowstone_national_park_volcano_eruption.pdfIn PDF document text
    • https://kopiwuzurori.weebly.com/uploads/1/3/1/3/131398237/kiwef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417806/normal_6021a58cba9ee.pdfIn PDF document text
    • https://cdn.sqhk.co/mugodetutag/jYKjfje/virgin_money_plc_annual_report_2018.pdfIn PDF document text
    • http://tetiviguxawik.getenjoyment.net/37762320190.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490365/normal_5feaef2ea6bf7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475570/normal_604dda81f2fed.pdfIn PDF document text
    • https://fejuzewe.weebly.com/uploads/1/3/4/8/134883228/vuvugutob.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://df6a9abb-74f3-47e1-b359-fe6d1019da36.filesusr.com/ugd/7921d2_4ade111297014f60b597b8fe5ddec50c.pdf?index=trueIn PDF document text
    • https://a1c9bafd-2917-4c1b-b79c-a4b44a941470.filesusr.com/ugd/f0f215_4f08031fa5bf42e6964c551cfb2611ed.pdf?index=trueIn PDF document text
    • http://kesolimasakifi.myartsonline.com/our_lady_of_the_lake_university_baseball_coaches.pdfIn PDF document text
    • https://144c9d4d-401b-437b-b89f-6a5816d7da47.filesusr.com/ugd/cd33f5_dc19c9be755c43b49ec202f3b4a34a12.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F3 5300 bytes
SHA-256: 9fe0fc86a96d0a3253fc7bf4d901435109d3e48e1ac5d998ad03514b7b50808a
font_01_sfnt_off000107e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107E3 11628 bytes
SHA-256: 7bb80ad0ed9596eee45f9c39fa5e5d3ccbd73cdd91f529abb2eea54bc4322cde