Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f95eed2a51b9560…

MALICIOUS

PDF

85.9 KB Created: 2020-11-21 22:47:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: f4f2083190932b7c99fe0f423d153f8b SHA-1: bd3b62c47956af988574617091a4ce99a7ad36c6 SHA-256: 3f95eed2a51b9560eb93c60f8d09f291a487fb8bb8ad87e4a06051a4b7c5ddae
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The presence of a large number of external PDF links suggests a link farm or phishing attempt. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious intent, likely to redirect users to phishing or malware-hosting sites.

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
  • 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/123?utm_term=mary%2527s+quincea+c3+b1eras In PDF document text
    • https://mukaxonalox.weebly.com/uploads/1/3/4/5/134580963/gafexevo.pdfIn PDF document text
    • https://litoxixolemor.weebly.com/uploads/1/3/4/3/134379235/8a10a.pdfIn PDF document text
    • https://vadazexo.weebly.com/uploads/1/3/4/6/134646317/tevimul.pdfIn PDF document text
    • https://gujibimusexuwub.weebly.com/uploads/1/3/4/0/134042380/1548668.pdfIn PDF document text
    • https://jujepuwajepoxox.weebly.com/uploads/1/3/4/4/134466337/zegolesiwomur-towovow-kobevuxov.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/pesetufavo/adverbial_clause_test.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/amnesia_justine_walkthrough.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/25330224616.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acaf4035-746f-401a-b2a0-98be1f98747a/79107555610.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwotarotavuz/ibps_calendar_2018-_19.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aeeee5df-5605-4e10-80fd-24a2ddf45e32/autodwg_to_dwg_converter_serial_number.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_off00010e86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E86 5384 bytes
SHA-256: d377ec54a263f0e824862d4037eb2ae1e288954a22d830e277db20253fb3a2ca
font_01_sfnt_off00012109.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12109 13088 bytes
SHA-256: 74614ee12f209d5529fbfa931790bcc00f62bcb375104d87fc7d3c9bb580ddbb

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