Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec15b7f8c2a3d508…

MALICIOUS

PDF

41.2 KB Created: 2020-08-28 06:18:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: c6e58c4576a57fd507352468e2b591db SHA-1: bc3846814eeadb2930b913abb43cef90d0c93ed9 SHA-256: ec15b7f8c2a3d5082cf51b1214bacbdb95c8f47fa03a47dc861232843f519b76
234 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.ru/pify?keyword=assassin%2527+s+creed+syndicate+southwark+chest+underground In PDF document text
    • http://files.course-group.com/uploads/1/3/1/4/131437750/sedelomabigewem_pefita_kosuzagudo.pdfIn PDF document text
    • http://files.naminggraceinthedomesticchurch.com/uploads/1/3/0/8/130813799/cc34cb.pdfIn PDF document text
    • http://files.pa4sc.com/uploads/1/3/0/7/130776063/fukab.pdfIn PDF document text
    • http://dopib.delicatefortress.com/uploads/1/3/1/3/131398455/zitibupodozeze_tonavugebaju.pdfIn PDF document text
    • http://files.gairdin.com/uploads/1/3/1/3/131382673/lewiwu.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/1/0448/1302/5431/files/29223539746.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3063/3881/files/libro_de_arqueologia_biblica.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8235/7663/files/teclado_espaol_mexico_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2022/1607/files/translation_rotation_reflection_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9386/8187/files/xirinarezemoliwawewimulad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9291/1007/files/missguided_white_cut_out_swimsuit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/8105/6665/files/internet_video_er_iphone_app.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6332/9446/files/lofobiwumadapujutasule.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2021/2645/files/26009366310.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5473/4235/files/tevodatominadixodif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3637/6214/files/admiralty_jurisdiction_act_nigeria.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 7

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_off00006336.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6336 5448 bytes
SHA-256: 7b42146aeb6bec2ea3410af9a4df59881ed10263b9e4d33b7ed3d98e8da89e8b
font_01_sfnt_off000075c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75C8 9900 bytes
SHA-256: b0a1cbeeb9901b71f11ac0cf02c6ca6548b407b513953b5a55d317bcad1381e3

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