Malicious PDF — malware analysis report

Static analysis result for SHA-256 be0abefca75433a7…

MALICIOUS

PDF

56.1 KB Created: 2020-10-16 09:49:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 1f056c53e193d3dc27793a3abb58374b SHA-1: f400ec925e5e98c94c9bf1497c886cbc8a2fcb9c SHA-256: be0abefca75433a70432f124e350e718b80f41668284baa4d11c134cc2af689b
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=inventory+management+problems+pdf In PDF document text
    • https://folukufisika.weebly.com/uploads/1/3/1/3/131384255/bokelevofoz-bomofizo-koxug-wasomumuzudim.pdfIn PDF document text
    • https://sujajikozodes.weebly.com/uploads/1/3/1/3/131384638/vofizewevew.pdfIn PDF document text
    • https://wepugimi.weebly.com/uploads/1/3/1/0/131070973/9b18cd795bd.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/xizaxamuxive.pdfIn PDF document text
    • https://ridolagu.weebly.com/uploads/1/3/0/7/130775195/6716312.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://uploads.strikinglycdn.com/files/bcea5d38-caf4-4912-b6a0-6cbab6dae19f/51512948443.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f27890d1-1bbc-4a20-b6e1-4304b52c63bd/22764581246.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0278/9525/files/no_child_of_mine_reddit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1409/4487/files/20981460923.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/7642/6144/files/vodupugekuguzo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/3070/8129/files/ibm_cobol_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/6249/9765/files/lycoming_o-540_b4b5_parts_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2358/0830/files/chrome_apk_file_for_pc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3276/3801/files/gobominerududaxibizefu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6472/1562/files/14033252595.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/9276/1494/files/retro_handset_receiver_for_mobile_phones.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7222/5442/files/23076375297.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/4047/1702/files/sussex_county_ymca_jobs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/6930/4743/files/rukapawipuvar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4794/2294/files/begerodezofazopate.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_off00008e9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E9A 5340 bytes
SHA-256: a9a4053b005d9e45ab22ec630fc316965cc37f2076668e409bcee6b3e22fa88f
font_01_sfnt_off0000a0a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA0A9 10504 bytes
SHA-256: 3f383825f30e98468d4e25844fdfa5d5a6d987defb5b4ff7775f7b2eef742cb4
font_02_sfnt_off0000c4a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4A3 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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