Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ebb3750103c79f2…

MALICIOUS

PDF

67.3 KB Created: 2021-01-04 12:12:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: a114b688372c1efa8e4c7244a7631648 SHA-1: ed5262023c7f6f45d569e94dd76435fbae16acee SHA-256: 5ebb3750103c79f2463c349f701898d28f57d1bdbf62f060dc6be135228b8b84
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass external PDF link farm, suggesting a coordinated effort to drive traffic to potentially malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

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://traffmen.ru/aws?utm_term=sakhi+songs++teluguwap In PDF document text
    • https://zegasapazenavu.weebly.com/uploads/1/3/5/3/135326880/e22b49089.pdfIn PDF document text
    • https://cdn.sqhk.co/varomapit/Ivkrjdl/the_ramen_sensei_2_mod_apk_unlimited_everything.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380539/normal_5fe0b5cedaac0.pdfIn PDF document text
    • https://cdn.sqhk.co/sixepatexup/Y4PM3QU/vitamin_c_powder_drink.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367961/normal_5fdc890fe6c91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387562/normal_5f8ef278d9a31.pdfIn PDF document text
    • https://pomisefinare.weebly.com/uploads/1/3/4/9/134902228/868b9cfade1.pdfIn PDF document text
    • https://cdn.sqhk.co/guledijuxi/jIEhehj/cruise_lines_stock_market.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468823/normal_5fce94707c5f2.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/e3d01af8-2da4-45b8-b28f-b699cf832be9/miss_usa_2011_preliminary_competition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3ecd98a-2856-4cfa-865b-eb400e42647d/22496122240.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10303ccb-3723-48dd-810a-b4a6962eb2e5/6881108730.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/davivodefotetuwerifogakav.pdfIn PDF document text
    • https://s3.amazonaws.com/wizuluworafid/anime_haven_net.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c45eed6-b9c3-4fb5-af80-ebe32d612010/17516321811.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_off0000c8a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8A3 5244 bytes
SHA-256: 0c7b650eb61d4c73c8def96597cb64eb524b751510f8e1aff35f29a338155f67
font_01_sfnt_off0000da8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA8E 11032 bytes
SHA-256: 190b3e99213abe7140afde3eab06334569573aef29a69808d7a2aaa48c1d167a

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