Malicious PDF — malware analysis report

Static analysis result for SHA-256 15ff64efe44fafc8…

MALICIOUS

PDF

70.3 KB Created: 2020-11-09 23:19:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 614e87e3c96351ed798467425c4f24e6 SHA-1: ee03a36be189ca412a6d9d780cf5de7496b81670 SHA-256: 15ff64efe44fafc829947bc63f07a13b1efed5c18d450a34106b418095dd9ce4
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, with a significant number pointing to a link farm hosted on weebly.com, suggesting a malicious intent to manipulate search engine results or redirect users to potentially harmful content. The ClamAV detection and ML classifier strongly indicate maliciousness, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffnew.ru/aws?keyword=what+is+advanced+topics+in+math+mean PDF link annotation
    • https://pobasejedewepiz.weebly.com/uploads/1/3/4/0/134017346/0eadf5b5edcd168.pdfIn PDF document text
    • https://rimuzomidaz.weebly.com/uploads/1/3/4/3/134353295/zetuligokumobepitad.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/b4c259a16fe1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/megulu/pap_guidelines_algorithm.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a269d5bb-946c-4bac-b739-f6a3ad10f469/midazivog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b33c499-26e0-4790-a108-30533bea4a8d/buzoxakugometoluduno.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3eb095f4-114b-4ce8-a022-35e01a3ef0f2/96516014217.pdfIn PDF document text
    • https://s3.amazonaws.com/gurafoga/xosiziwovujukafuzarifoloj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53299861-ef2d-451d-aa1b-2cb72c8a5c8b/spoken_english_book_in_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/466b46f3-76d5-44f7-a028-e9322b0c3cd2/67018441098.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/towing_a_frame_plans.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56ceb20c-5504-4d3c-b959-efea692ead5c/tenawevixenuguvitib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d6f54a4-d40e-4c08-b384-62869067b6f5/43298714612.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_off0000d6fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6FA 5260 bytes
SHA-256: d24a2417f77a97e1a24dfda38024fde1d8773c405ec85fd134040f377b39c844
font_01_sfnt_off0000e8c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C6 10484 bytes
SHA-256: 27721ea462eef965b1a93a1ad1a59edc763ca932ba289b249f350fb1f3c8a6fb

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