Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd47068053b97561…

MALICIOUS

PDF

64.2 KB Created: 2020-11-17 03:24:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 9e29f3b37a87b69595b0da8098be40ac SHA-1: 8482529d03ef9a6b222b03abd9d7fb74048e264d SHA-256: bd47068053b975612661eb6471abe13ce8a2efd5fdd86b9fbb08427f11a4d5b5
214 Risk Score

Malware Insights

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

The file is a PDF containing a link to a known malicious redirector, disguised with a search query for a common product. The PDF also hosts a large number of external links, many of which are to PDFs, suggesting a link farm or SEO poisoning attempt. ClamAV detected this as Pdf.Phishing.Trojan, and a machine learning classifier also flagged it as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://cctraff.ru/123?utm_term=ikea+shower+caddy+plastic In PDF document text
    • https://mupoveno.weebly.com/uploads/1/3/4/3/134371030/metinuzuweson_pabijeb_zepilagixuzolu_viraxuwesezokip.pdfIn PDF document text
    • https://korumarivaz.weebly.com/uploads/1/3/4/5/134506991/65c84a62590bcca.pdfIn PDF document text
    • https://giledaxije.weebly.com/uploads/1/3/4/3/134312043/vuvebotivej.pdfIn PDF document text
    • https://vewutaniwem.weebly.com/uploads/1/3/0/8/130873717/3780b5df91.pdfIn PDF document text
    • https://vaxajiwozoli.weebly.com/uploads/1/3/1/6/131637631/tokizivofakisejav.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/fowonaxul/answer_key_2019_upsc_prelims.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92d78050-1e9c-414a-b1cf-8b4b61356a19/51136996879.pdfIn PDF document text
    • https://s3.amazonaws.com/xelimewat/98496058412.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/add721c1-4b25-410a-bbf4-e71a479d4f90/lagu_atikah_edelweis_full_album.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff5c07b6-4cf5-4483-9a5c-fb38a4f56f6f/sesasokusuxubetoziremolu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0fb4d77-3efc-4e9a-8175-523dae67c71a/guxagafog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a66e03c-8474-4a23-a27c-9ce271f97f27/73194292472.pdfIn PDF document text
    • https://s3.amazonaws.com/befarekogol/76401366229.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcc83a02-510a-4a62-b2de-eeadba9cf286/kumefimeti.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_off0000b8f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8F0 5356 bytes
SHA-256: 17449560a1c731363337463698aca1d5c036d9592193867f3fd1ba82974e3850
font_01_sfnt_off0000cb42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB42 12256 bytes
SHA-256: 604bd917a785aa9020788350bd3acc51e74fc8d0af9c93a64983dcb10ef25c60

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