Malicious PDF — malware analysis report

Static analysis result for SHA-256 57303759116be88e…

MALICIOUS

PDF

64.8 KB Created: 2020-11-11 02:13:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 9c0939efa723ade5f75af40370f36de6 SHA-1: c132741fc0b87ff2d9c92f988eb0265bd908c033 SHA-256: 57303759116be88eba50932fcaf036dd77c34486d139d8a517a3bf0ed3afa162
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by multiple heuristics, including PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, indicating a high likelihood of malicious intent. The embedded URLs, particularly the one on 'traffine.ru', suggest a phishing or SEO spamming campaign. Although no scripts were explicitly extracted, the PDF structure and heuristic firings point towards an attempt to redirect users to potentially harmful content.

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
  • 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://traffine.ru/123?keyword=polk+county+notice+of+commencement+pdf PDF link annotation
    • https://dozexida.weebly.com/uploads/1/3/4/5/134590021/kiruzazofejupef.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/tidivobinimigip-banez-batipafon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385853/normal_5f8fe8a8f1150.pdfIn PDF document text
    • https://zemovawid.weebly.com/uploads/1/3/4/6/134608463/72ce946c47a.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/58db2104-a54c-4ad3-bf6e-1f3dcac516c3/wild_cheryl_strayed_free_ebook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f330326-8469-40be-926d-89339d889b80/5684520547.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a368ac23-9bfa-4f46-9a8d-5b16568350b5/3112921986.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fac848b9-2181-418f-8d67-924d10a95933/verismo_600_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3385ccc4-bfb7-4f87-90ab-13f90adf4f92/40539168230.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b1bb998-0c25-4707-906f-faf03bb2dd17/las_medias_rojas_analisis_literario_abriendo_puertas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e10dc9d-3231-4367-adec-096d2eea2ca0/japatorideduxep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3ffc713-e5e3-42e7-8bb3-c6db8d342dee/niacin_the_real_story_hoffer.pdfIn PDF document text
    • https://s3.amazonaws.com/divelikubapiwaj/nemebojuvimogerozoluxowe.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_off0000c108.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC108 4984 bytes
SHA-256: 0c080159ca67d4fd42c510f88d6879b0f0bccdd8dc54a538d1c3e2e63dc58729
font_01_sfnt_off0000d202.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD202 10616 bytes
SHA-256: 042cca6ffde5d040b40cbfbca9de699dea05bc6d271ce96ca10b61d72a0a6ac5

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