Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b6c79b3649fa7ec…

MALICIOUS

PDF

51.3 KB Created: 2020-08-20 14:22:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: b26488ebc8fb0f1f7a5e29537d9b0a70 SHA-1: 26a7fe0c30b2b6850748119e072b6fb58d7f7a6e SHA-256: 7b6c79b3649fa7eca67f096f34542b88c30a5e1dd79c643ff15bce74a5cfead5
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://ttraff.com/pify?keyword=instagram+apk+mod+new+version In PDF document text
    • http://vegafo.menaicentral.com/uploads/1/3/1/4/131408832/safijimu_niwilutop_kunuzinurimep_jajodekigakeg.pdfIn PDF document text
    • http://files.theboltonline.org/uploads/1/3/1/4/131437056/b6841b.pdfIn PDF document text
    • http://pijot.hiddenhillswissies.com/uploads/1/3/0/8/130814238/322098.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9114/0509/files/algebraic_geometry_and_arithmetic_curves_qing_liu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4241/4492/files/vovunowebotebulod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9726/0192/files/35154584438.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3765/5193/files/piwinadu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3775/3501/files/zijagapu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5543/0309/files/jokikapelexusozusexeve.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1897/7443/files/intelligent_business_intermediate_coursebook_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6177/1430/files/astrand_bike_test_protocol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7108/6485/files/learn_arabic_letters.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4225/7561/files/aftab_e_alam_book_in_urdu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5015/3622/files/xumidaselisaladalo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4411/8428/files/supply_chain_risk_management_thesis.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007a7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A7C 5188 bytes
SHA-256: be43bc07c291183a4ef227529ec89de4b4236585ad4f657800387c5c69d578fa
font_01_sfnt_off00008c19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C19 11156 bytes
SHA-256: d0ff3f6ce64a482ca618c0881007272a436f119891a62678025292538a161084
font_02_sfnt_off0000b228.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB228 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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