Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a4fe2f67e887792…

MALICIOUS

PDF

37.7 KB Created: 2020-10-17 04:49:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: d6edce140a2991f59e50646597659394 SHA-1: 505f383c380b44d4d93a5de3c7942149bc4dfeb0 SHA-256: 7a4fe2f67e887792d7f93d719b0e35715e320103b41d18dc105f76f6c7dfef9b
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=sch%25C3%25A9ma+de+la+cellule In PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/jolon_koxuzozudanik_makilitinami.pdfIn PDF document text
    • https://xebikazogede.weebly.com/uploads/1/3/2/7/132740990/rikupeg.pdfIn PDF document text
    • https://sozivutapadonen.weebly.com/uploads/1/3/1/1/131164462/tojefazefir.pdfIn PDF document text
    • https://kelobutino.weebly.com/uploads/1/3/0/9/130969458/a0cb48.pdfIn PDF document text
    • https://ranerenonosojib.weebly.com/uploads/1/3/1/4/131483420/popupojiki.pdfIn PDF document text
    • https://mefemanodi.weebly.com/uploads/1/3/1/4/131454269/ditudole_bunome.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/4106527.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/digokasawuj-jipamuputevuf.pdfIn PDF document text
    • https://nikoxutaju.weebly.com/uploads/1/3/1/3/131378952/bipuwovoniwelu-kosodipa.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/1/0482/7915/8948/files/48377932320.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/3013/8013/files/navy_blue_jackets_manual_25th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6303/3502/files/traeger_baked_potato_soup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7727/8627/files/hng_dn_live_stream_facebook_trn_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8725/6480/files/fogogibibamemesufuminutef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/5349/3655/files/77772032865.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8235/9994/files/xogiketufasegujanozimu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/6642/8054/files/google_usa_site_only.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6612/0609/files/sat_test_dates_august_2020.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_off000053f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53F1 5148 bytes
SHA-256: 16c3f58df3866eb65b5c97820bc7f32143d7869b35400183716102ee627080e1
font_01_sfnt_off00006505.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6505 10868 bytes
SHA-256: 127be350bdfb5c1c8962c5646ccab487f6f723ff95c818d91d28e3e3e8f0d355

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