Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a4eda3e6f096740…

MALICIOUS

PDF

76.6 KB Created: 2021-03-21 00:09:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 7322a88d24b0771e6de1513f0beddd68 SHA-1: 219498bc9734c4a23bc629c318829ea5431acebe SHA-256: 9a4eda3e6f096740a875143c877bf9a2fa9d9d01671f1e19619098947205edf0
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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://leonvi.ru/wix?keyword=que+es+soberania+nacional PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4484103/normal_601465d0b60d1.pdfIn PDF document text
    • https://cdn.sqhk.co/nezazexador/5ggujgS/phrases_and_clauses_exercise_with_answers.pdfIn PDF document text
    • https://jerexibim.weebly.com/uploads/1/3/4/6/134654770/3037277.pdfIn PDF document text
    • https://cdn.sqhk.co/lamiwifa/eG9Ffij/bike_racing_games_free_download_for_windows_10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450876/normal_6036ae02a6ba3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471683/normal_603d3ecd035b4.pdfIn PDF document text
    • http://nesobaka3.xyz/how_to_write_a_compare_and_contrast_essay_thesistfzu0.pdfIn PDF document text
    • https://vujewixijul.weebly.com/uploads/1/3/1/4/131437312/sidum-wasuwutesu-nigurelifi-jaruzusi.pdfIn PDF document text
    • http://kismykeitio.best/john_deere_x360_for_saley6yvd.pdfIn PDF document text
    • https://rikusinifo.weebly.com/uploads/1/3/4/0/134017093/95e807df.pdfIn PDF document text
    • http://bonboxstudio.com/tawave5lbk7.pdfIn PDF document text
    • https://cdn.sqhk.co/gebitasixa/iihjhic/33201889905.pdfIn PDF document text
    • http://lovelid.xyz/nabudodawusaqp3cp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4328a374-8b5c-4134-9cef-e132ca5fc89d.filesusr.com/ugd/6732b1_1ed3925e6a2b4553aade60f6e8b0084c.pdf?index=trueIn PDF document text
    • http://lamisegowa.epizy.com/jerepadov.pdfIn PDF document text
    • http://likasiz.epizy.com/loxifibimevumezet.pdfIn PDF document text
    • https://b5f169ef-6bcf-4d19-a24b-32bdc9dd7a5f.filesusr.com/ugd/2e79a6_17332a9eb18f41b5a4e05519b8b736fd.pdf?index=trueIn PDF document text
    • https://56db2a4d-09ce-4ff6-a558-abb1d6727cd4.filesusr.com/ugd/003b86_42dec35fd4214f49a8bf262010d1d150.pdf?index=trueIn PDF document text
    • https://cef8af8d-7071-4339-ac50-fc417d371010.filesusr.com/ugd/a89196_472facf9724b43f98ce83b5a902b8020.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB6 4996 bytes
SHA-256: 48b8865f9b04eebac8cb6312ade2769303f85b176814b06e085843e19e3ce0e8
font_01_sfnt_off0000fcb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB9 12348 bytes
SHA-256: 26050ed769d50ea34e8467ee83e57b65de38881d3f1e7ddded93460cbd7c1f1e

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