Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbe68db5a4b86c7a…

MALICIOUS

PDF

32.3 KB Created: 2020-10-31 23:18:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 43675d7c0c3d70b125306a0847b6df25 SHA-1: b065f516fe95b68683b805816fea13b45ec55391 SHA-256: cbe68db5a4b86c7ae80db77571aac89c5f34e48c801db5fa34b36599830cc5d3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded URLs, many of which point to a link farm designed to redirect users to other resources. One critical heuristic identified a link to known malicious redirector infrastructure, suggesting an attempt to lead users to malicious sites or download further payloads. The document body, though heavily obfuscated, contains references to URLs that are part of this link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://gettraff.ru/wb?keyword=ellas%20kitchen%20book%20pdf In PDF document text
    • https://suzokixuvajix.weebly.com/uploads/1/3/0/7/130776208/gowunufow_xapomozojegese.pdfIn PDF document text
    • https://xififaxapid.weebly.com/uploads/1/3/4/3/134344339/9819538.pdfIn PDF document text
    • https://murenazomof.weebly.com/uploads/1/3/4/0/134012525/1909417.pdfIn PDF document text
    • https://ladofozaser.weebly.com/uploads/1/3/4/3/134334290/luxawisiji.pdfIn PDF document text
    • https://xogexemufak.weebly.com/uploads/1/3/1/4/131437987/3916656.pdfIn PDF document text
    • https://sizojupitad.weebly.com/uploads/1/3/4/3/134332657/lokusofaj-sijitiji-bilofor.pdfIn PDF document text
    • https://mitixofixomu.weebly.com/uploads/1/3/4/3/134333727/6e56b5bb6f7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/9710/6848/files/trk_dili_tarihi_indir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7623/0046/files/semavafagibotexeva.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/korean_drinking_age_reddit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0508/0095/1454/files/cross_country_trains_terms.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/2386/8319/files/mizalipepofujuxabe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/6200/8226/files/7576254147.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/6429/6092/files/gadodowafuronidogesabu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/1437/9432/files/parts_of_speech_notes_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2827/4582/files/show_hidden_system_files_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/8152/8985/files/megan_jane_ramsay_job.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_off00004545.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4545 5308 bytes
SHA-256: 88a3bd2555d91a67a681a03c8d3bd84eaaec15050d0065740cedc061b617f71c
font_01_sfnt_off0000574b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x574B 8512 bytes
SHA-256: 0452ed1a0efb544b113bd1e9422e321faa6f96474a894a2bbd9aa7ffa9c7fb41

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