Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3a505305fbd9900…

MALICIOUS

PDF

84.2 KB Created: 2021-04-18 22:33:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: c0ee246f23996be05e73f2c33f1942b0 SHA-1: 2209ecdc6a54a4c6d0feafc3c2ec9c22124e1d14 SHA-256: b3a505305fbd99001939c2c8e3eeffc13954a1abc8fec2ca8efd111c3680c0bd
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan distribution attempt. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs further supports this malicious intent.

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://fokemale.ru/strik?utm_term=magic+bullet+printhead+cleaner+ingredients PDF link annotation
    • http://xexufonek.iblogger.org/54646481092.pdfIn PDF document text
    • http://todolosepaxo.iblogger.org/47096786642.pdfIn PDF document text
    • http://rozel.ru/how_to_count_to_one_thousandjn3ug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450256/normal_60498b9b7ca63.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384461/normal_600c5a33856ec.pdfIn PDF document text
    • https://kenuvibugitevam.weebly.com/uploads/1/3/4/7/134700053/redizizusikigad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371025/normal_5fe6f7bf9e264.pdfIn PDF document text
    • https://tumulole.weebly.com/uploads/1/3/6/0/136054957/2f42f3f69796fc1.pdfIn PDF document text
    • https://dodezugufiz.weebly.com/uploads/1/3/5/3/135331092/8556272.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373757/normal_600ddb8d59e24.pdfIn PDF document text
    • http://linza.media/verbe_avoir_au_present_exercices55blv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497359/normal_5ffe506d8c1cf.pdfIn PDF document text
    • https://wididalinur.weebly.com/uploads/1/3/3/9/133986726/bigaworojofusij_zaxexumoxozin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391326/normal_6050e06f9570c.pdfIn PDF document text
    • https://mepalowe.weebly.com/uploads/1/3/1/0/131070826/wajozifu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482629/normal_602d9a4128769.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b64243d8-784b-4f96-bbe7-d3ce80cd36cd/vumilifipilideziwadujad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71a2ec31-5392-4add-bad3-2b3540c07b5d/46060860614.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f4b2659-228e-4732-9fb6-3c5e3725c162/gepisaloxeretoba.pdfIn PDF document text
    • http://bisixavig.epizy.com/xaxipopimesidumenibasego.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010bbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BBD 5480 bytes
SHA-256: 65abcbf94407d0ad143477b7e10693279aafd6211881ec080bfdc0e2378cbaff
font_01_sfnt_off00011e5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E5C 10824 bytes
SHA-256: bbba11d595238f52aa9b8d4eee4b0969088996c70f998df4a5b056bb13a8f01f

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