Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1b1939aa7948911…

MALICIOUS

PDF

77.0 KB Created: 2021-02-23 18:14:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: bf02df415ff5802ecd62406ab7221a1d SHA-1: 2e6034e096f36de4623abf1d01c62c1b3285fbeb SHA-256: e1b1939aa7948911e6ae32b89de3ccdee856a94c4cf7237737234b9308a3e7b9
214 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are flagged as malicious or part of a link farm. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically identifies a link to 'yafferge.ru' as a malicious redirector. The presence of a large number of PDF links suggests an attempt to manipulate search engine rankings or distribute further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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/strik?utm_term=plc+programming+training+centre In PDF document text
    • https://cdn.sqhk.co/nebinefis/fshdjge/fuzoruxe.pdfIn PDF document text
    • https://norasegineze.weebly.com/uploads/1/3/6/0/136082699/zituw.pdfIn PDF document text
    • https://volifinidolil.weebly.com/uploads/1/3/0/8/130873876/089e988f3976a.pdfIn PDF document text
    • https://gubukaxonular.weebly.com/uploads/1/3/5/3/135349028/4373d.pdfIn PDF document text
    • https://cdn.sqhk.co/wozovege/lrnwJjg/rukizimukonozinuwoxobo.pdfIn PDF document text
    • https://vunidiripoga.weebly.com/uploads/1/3/1/4/131453449/5021304.pdfIn PDF document text
    • http://ferejupaxebul.iblogger.org/32451587783.pdfIn PDF document text
    • https://nokaxogu.weebly.com/uploads/1/3/4/5/134520383/fafukutir_zobonideliwa.pdfIn PDF document text
    • https://tivenudonokokom.weebly.com/uploads/1/3/0/9/130969369/tapelujepava.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://s3.amazonaws.com/purawuma/dapipoderebize.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/54217375958.pdfIn PDF document text
    • http://domulogud.epizy.com/kumukedekulejere.pdfIn PDF document text
    • https://s3.amazonaws.com/zesixefe/amma_maata_audio_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/dusined/xelozonevul.pdfIn PDF document text
    • https://s3.amazonaws.com/lolijexejomak/verizon_quantum_gateway_router_setup.pdfIn PDF document text
    • https://s3.amazonaws.com/mamibis/15485594119.pdfIn PDF document text
    • https://s3.amazonaws.com/zubuwujoxom/riverdale_episode_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/mogedozara/93997989479.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/47393192899.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e606.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE606 4864 bytes
SHA-256: 4b48b26a20403e10355bf9d0030fd1158c466140d069b557a2229bd3bafa7644
font_01_sfnt_off0000f664.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF664 9880 bytes
SHA-256: 881969baa4e730a7d4405b6ba93c97b64459a01f828a60b6065e08553f4cc813
font_02_sfnt_off00011834.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11834 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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