Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ec41cef8f714e89…

MALICIOUS

PDF

85.6 KB Created: 2021-03-24 04:02:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 3b114eb7ce17c214eca37263048e8412 SHA-1: bcd4b6e7396faf4efc23937b652e6ddf7e84ac13 SHA-256: 5ec41cef8f714e8915681e25b95d33aa1450ad5ce5a958384bf4b81f7152388c
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing or trojan delivery mechanism. It contains a large number of external links, many pointing to other PDF files, suggesting a link farm or redirection strategy. The embedded content, though heavily obfuscated, appears to be related to product listings, likely a lure to direct users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • 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.
  • 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/wix?keyword=mongoose+ledge+2.1+women%2527s+mountain+bike PDF link annotation
    • http://zajozin.22web.org/tujigeb.pdfIn PDF document text
    • https://bojibelatos.weebly.com/uploads/1/3/4/0/134040608/zipazeja.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384839/normal_5ff95c89d13ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421350/normal_60155fc5d7568.pdfIn PDF document text
    • https://nevuvipegigi.weebly.com/uploads/1/3/4/5/134589722/dibegu.pdfIn PDF document text
    • https://buparemekixa.weebly.com/uploads/1/3/0/7/130739227/5962099.pdfIn PDF document text
    • https://pavonaxasove.weebly.com/uploads/1/3/5/3/135310158/fd4c659a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419206/normal_600a2148a18e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450434/normal_604b33d07e7e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424935/normal_6041601338863.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365589/normal_5fe25cae167d6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450240/normal_5fceda57da843.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425256/normal_5fefca3524df4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458417/normal_5fcaf641c3528.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410989/normal_603f3a8bb22e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501791/normal_6029851a906ef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421630/normal_5fe4fe6a108a0.pdfIn PDF document text
    • https://pitefomut.weebly.com/uploads/1/3/2/6/132682610/negonalimisuselu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481839/normal_600502df3ca0b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387056/normal_602ac078c079b.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/785a6420-c73f-4ce4-a61d-cb7dee01eb8e/how_to_replace_bearings_on_lg_tromm_washer.pdfIn PDF document text
    • http://moretavumafoge.epizy.com/88641178656.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2cd51ba-359b-4e43-9c09-030405f7abe3/gaxusen.pdfIn PDF document text
    • http://wizajevul.epizy.com/milady_esthetics_student_workbook_answers.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_off00010210.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10210 5484 bytes
SHA-256: 597a53fbdbd17b40e38f8333e1b270bed2982d179c5cfcd746b4948e63b20801
font_01_sfnt_off000114cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114CD 10592 bytes
SHA-256: 3d46c19dbe07ed21730a70b5f30ad6e8b45bff169084e8b6bf5456fbac0b1899
font_02_sfnt_off000138d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138D6 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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