Malicious PDF — malware analysis report

Static analysis result for SHA-256 11d2595feeb08fda…

MALICIOUS

PDF

83.0 KB Created: 2021-03-17 13:30:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e1d14ba5c5ede272a7c5a2867dce66e3 SHA-1: b17f1111e38c610a72b3bc9f5c55798802c17b8b SHA-256: 11d2595feeb08fdaf50551b428eaafd9edfeead25af3fb355f3fec4c183227cb
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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.
  • 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://fokemale.ru/wix?keyword=white+rodgers+50e47-843+manual PDF link annotation
    • https://cdn.sqhk.co/lexewagoz/LqfjbJO/hearthstone_arena_beginners_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/ravusigi/hahhijW/mermaid_themed_baby_photoshoot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409806/normal_602d747f7afc7.pdfIn PDF document text
    • https://cdn.sqhk.co/jivonaxadu/fjidXBK/pujuxakajo.pdfIn PDF document text
    • http://nefuzixitelu.iblogger.org/aptoide_apple_store.pdfIn PDF document text
    • https://cdn.sqhk.co/padirazemi/idDjjM8/fowuzegagiveferubepo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448096/normal_6031fb762c2a5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443329/normal_5ffc59eb46de5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1ceef7f3-d523-4f80-a0a4-3aed54d3d17a.filesusr.com/ugd/48841a_86fcb3278a1441aeae2764f9389da772.pdf?index=trueIn PDF document text
    • https://0fe83ef2-ed6b-4f04-a52d-31fe3c58d8d1.filesusr.com/ugd/ade4e6_e8dcc9134b3442239b6c8bc9aed692aa.pdf?index=trueIn PDF document text
    • http://rebobimakefeli.epizy.com/galavutadegatele.pdfIn PDF document text
    • https://s3.amazonaws.com/xilasisefi/76282415579.pdfIn PDF document text
    • https://1a9cd40a-f0d6-44d4-a143-19288280ca2b.filesusr.com/ugd/7a13df_d0a92ca564804d758fa9cb6676ffafbe.pdf?index=trueIn PDF document text
    • http://jiruroxi.epizy.com/tamuwubunininalilizu.pdfIn PDF document text
    • https://s3.amazonaws.com/zubuwujoxom/13709931234.pdfIn PDF document text
    • https://9334512a-4df1-45dc-8804-f0fa1d9e2a3d.filesusr.com/ugd/9466eb_ed8d44520e4743e3a47797f78fb1733b.pdf?index=trueIn 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00011395.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11395 23304 bytes
SHA-256: 84ded29ff15bbfedfebd8ba5578c22b82fa041412c70bf4a191cb8080763ac5c
font_00_sfnt_off0000db5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB5D 6076 bytes
SHA-256: e996c8aa26a26b6540e2314731e48d824b3491fb45056a5126513533600ac44d
font_01_sfnt_off0000f005.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF005 10276 bytes
SHA-256: e75281bb83ed2892b73fd7101ce8f0c41598b6f8ec0109a1a84d020aed4ab8c6

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