Malicious PDF — malware analysis report

Static analysis result for SHA-256 78accff107696927…

MALICIOUS

PDF

68.3 KB Created: 2020-11-24 18:54:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e3c20de3ad7774c8f48ea9e6f8f216a1 SHA-1: d25753789ededad22959464fee680751c7f7d6f9 SHA-256: 78accff107696927a823829f4a223a4dd2e55e849b4d93969b9f7519e0e233dd
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The heuristic firings indicate a high likelihood of malicious intent, specifically related to phishing or malware distribution through link farms. While no scripts were directly extracted, the PDF structure itself is leveraged to present a deceptive interface, likely to lure users into clicking malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffmen.ru/123?utm_term=wow+focus+macro+help In PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/gowijipomunolu_lirogub_loletakimup_rozugofekowe.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/e5bcd2697.pdfIn PDF document text
    • https://fipokotosa.weebly.com/uploads/1/3/4/5/134506619/1155410.pdfIn PDF document text
    • https://nabutamu.weebly.com/uploads/1/3/4/5/134525390/3170869.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369329/normal_5fb3e9540a1f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366642/normal_5f9c400d7f5dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411491/normal_5f97e4966f83f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378425/normal_5f91c4a10907b.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/ninazarila/heat_resistant_plastic_sheet_suppliers.pdfIn PDF document text
    • https://s3.amazonaws.com/bikikanafopavu/debabogom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80d4e9d5-7e33-4a6a-8305-0e6bc9af2aea/xotediwuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac7a3c43-d4fd-4607-a7f5-fea9a2dffdb2/.pdfIn PDF document text
    • https://s3.amazonaws.com/tonisefoteka/bobby_bones_book.pdfIn PDF document text
    • https://s3.amazonaws.com/nitirew/81262600443.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/532581ba-ea65-4c2e-91e6-27a5645dd1f7/buvixawuteguwug.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_off0000c8c8.bin
736f116e4745dbc08c5b173956048b97342b60c395fadd48e0f2f9790b6002b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC8C8 5360 bytes
font_01_sfnt_off0000daf6.bin
ed375c9562bdc6eb1085a7d19823b2eb2e815edbf89e6b33c4dab715c3b95fc8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDAF6 12676 bytes

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