Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ee941b9bedb338d…

MALICIOUS

PDF

60.0 KB Created: 2020-11-14 01:47:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 5847157b2eef1e1c5c64644455678775 SHA-1: 87091f61562d592dd4467d947a77fea52f4ab07b SHA-256: 7ee941b9bedb338d83b995b3985592c37b368b29de8f7ebb039bf2e7cff8aa89
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one critical heuristic identifying it as a redirector link to known malicious infrastructure. Another heuristic indicates a PDF link farm, suggesting an attempt to obscure the final destination or distribute multiple malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ggtraff.ru/strik?utm_term=uso+de+suelo+merida In PDF document text
    • https://cdn-cms.f-static.net/uploads/4382778/normal_5f9960f32eab3.pdfIn PDF document text
    • https://jilukixewe.weebly.com/uploads/1/3/4/0/134042659/zegeguritewido.pdfIn PDF document text
    • https://radisowe.weebly.com/uploads/1/3/4/3/134366404/74d56a31cb.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/66fedebf-1869-4832-91d3-95d3e9ba0891/wufixumoberegajexufib.pdfIn PDF document text
    • https://s3.amazonaws.com/baxadelefofibuz/kotezamufadaju.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/29685315711.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/tupajinaxemutilokasonuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e536e2c5-d708-4fb6-8dc8-46f677a07afe/66248061251.pdfIn PDF document text
    • https://s3.amazonaws.com/vabemavuputenif/92063544301.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60e8e7f4-1bf4-40ae-8255-70b9e9f4d878/lojadojogesupujit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d81b0b43-a5fe-4765-ac2a-ddbc182fa7a1/negukitanujago.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81c21f1c-e818-4611-a3e6-da1cac3012de/psychology_themes_and_variations_10th_edition_download.pdfIn PDF document text
    • https://s3.amazonaws.com/lodunixodetum/21014062433.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_off0000aee3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEE3 4964 bytes
SHA-256: 9d2549d3cf0d4a8a6719d1fd18fa064aa55ac86661e3602eedbdbc8dddceea78
font_01_sfnt_off0000bfaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFAA 10548 bytes
SHA-256: e98966fda054589b2037325fdf3553c2c90646261c0f51147113887caf4fa43a

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