Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f04ef85075643a2…

MALICIOUS

PDF

41.4 KB Created: 2020-10-01 16:07:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: f0fa6727f28a24f00fad78bcbe35ae52 SHA-1: fe5b62243f0c462c15eb2e0d31bc60c9a9ecad7b SHA-256: 0f04ef85075643a285767a9c285ed021aa2115e56d36f2ccf0ae945fbddd7b2e
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/strik?keyword=abstract+algebra+an+introduction+hungerford+3rd+edition+pdf In PDF document text
    • http://files.ku-iraqueer.org/uploads/1/3/1/6/131606144/6643a.pdfIn PDF document text
    • http://gufemuluj.bede-group.co.uk/uploads/1/3/0/9/130970004/f572e20b52f00c0.pdfIn PDF document text
    • http://files.rhondastruminger.net/uploads/1/3/1/0/131071076/1562942.pdfIn PDF document text
    • http://files.biofordp.net/uploads/1/3/0/7/130739204/2620931.pdfIn PDF document text
    • http://lujawan.hiseyeshonduras.com/uploads/1/3/0/7/130776031/vanunudufagifa_lamubomasukap.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5582/5567/files/675_credit_score_personal_loan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0456/5142/7495/files/smile_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0998/1085/files/93783304024.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/7480/0798/files/azar_understanding_and_using_english_grammar_5th.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6834/9854/files/62100507650.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23430390-5bc3-4890-a36c-bf24e1bbcedb/zotowi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78724aff-eccb-4626-8236-cea478fe0f1f/risovanabafunuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0794f65-7ff8-4e0f-b630-19044393537d/tepawabuvikame.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cde0a5b-6fc9-4f44-8da0-47e5fce4093d/tugepoxukalevojakekomejaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e874680-9aa8-43a9-9591-eee220162e9f/96920358319.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c2669cd-2908-4f66-946e-df1dd847d0d3/futogulokinasatap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6d1feeb-e7bb-4b84-90c4-e20d640b07ba/nenemaje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e20ef4d7-2f17-4741-80b2-4524e2b3ca77/rakofulu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2c35734-4ff1-48c8-9955-005bc29eece3/6216864710.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ad6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AD6 5712 bytes
SHA-256: 2e69c58a92744ccd10ca7e1e412d2136c2d0fd00cbb9ebc594a847b830ba3567
font_01_sfnt_off00006e38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E38 13488 bytes
SHA-256: 6410053c7de7038873c8ca46f6335f4e736872df2fa26822898280e1331b7f1c

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