Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaa67cc242726594…

MALICIOUS

PDF

74.9 KB Created: 2021-01-08 16:34:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 6068f5bd07f1f83089219bf7a027f871 SHA-1: b23953ec4e418de50da9ded9d428db16e3438c1f SHA-256: eaa67cc242726594fe23c385ae4b8fafea09050174091147baa0165b0301a513
252 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to redirectors and link farms, indicating a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of a 'download button' lure further supports a malicious workflow, likely involving the download of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/aws?utm_term=wedding+anniversary+photoshop+templates In PDF document text
    • https://static.s123-cdn-static.com/uploads/4388163/normal_5fc834449bc52.pdfIn PDF document text
    • https://wujadagepixiv.weebly.com/uploads/1/3/1/8/131856877/gepefunigapuset_jarel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386830/normal_5f9f41f27ccb1.pdfIn PDF document text
    • https://cdn.sqhk.co/dulidara/ic3VghG/34766490485.pdfIn PDF document text
    • https://zupuxugemewizo.weebly.com/uploads/1/3/4/3/134309945/milijefevom.pdfIn PDF document text
    • https://sazefowefojewen.weebly.com/uploads/1/3/4/8/134893887/tesinu.pdfIn PDF document text
    • https://xefapakofaguwa.weebly.com/uploads/1/3/1/1/131164324/mivabu.pdfIn PDF document text
    • https://kufoxigokutef.weebly.com/uploads/1/3/1/8/131856815/vibisoloxokosob_sowiwat.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/658473a2-f4f5-48b5-90de-0ec3348c304c/the_world_s_end_movie_streaming.pdfIn PDF document text
    • https://s3.amazonaws.com/xaliwalufoguni/wifaxudevewivirak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbecdcf9-dde5-4320-83f7-4ee7e86bb9e1/1635972942.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f771fc2-c0b6-4449-893d-0d51c04dc5f3/xotogukiberikajaloses.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c0a81f2-f812-43c1-ac44-4768f62d9260/59424029273.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_off0000e1ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1EE 5548 bytes
SHA-256: c65a95b51af5c0f50980a1fe13929be73412af8ba2e7506e8f0da58147338685
font_01_sfnt_off0000f4b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B8 15672 bytes
SHA-256: 91d954d94084cd586e2a05679a7386ff6a6cf3194b7257148aa752624967da2a

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