Malicious PDF — malware analysis report

Static analysis result for SHA-256 a91b492fb9c84573…

MALICIOUS

PDF

44.8 KB Created: 2020-10-30 06:00:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 9c2d0f9520bb5280e40986412272e158 SHA-1: ca996ba8ba743f58c09a5f33c6f6067f00a43085 SHA-256: a91b492fb9c84573d705c089bea4f1db9f5699f2e170e70eb5748467bea15a84
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/aws?keyword=zelda+parallel+worlds+walkthrough+pdf In PDF document text
    • https://dirigesibujov.weebly.com/uploads/1/3/0/9/130969991/xaboxumenago_lexurira.pdfIn PDF document text
    • https://luvumape.weebly.com/uploads/1/3/4/4/134438520/meginamesudulinile.pdfIn PDF document text
    • https://jefogozadiz.weebly.com/uploads/1/3/4/0/134040800/f2ac3e1f17dfc6.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006276.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006276.bin)
    • http://www.daltonmaag.com/In extracted file (font_02_sfnt_off000097d6.bin)
    • https://uploads.strikinglycdn.com/files/2c8f1ca6-13b9-4628-8c85-209b04d3a1b8/79027629187.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fc36fab-8bb9-4a53-98a2-10ea24c1b3ab/daronolizepuweximidebatul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5689/7434/files/super_mario_sunshine_ds_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0758/0072/files/pcos_symptoms_yahoo_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/2481/6544/files/zitajebejom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/7836/7415/files/fruity_loops_studio_mobile_android_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/7630/4030/files/queen_mab_drawings.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/036102ca-318b-426c-b795-b0b79166d1f1/55515295461.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3353ea96-91a0-4bfe-aa39-87f469ef3f5c/pokemon_nds_rom_hacks_with_gen_7.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0507/2555/2314/files/luroxawitiviles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/994fc465-2172-46ad-917f-059a4a19edb9/21838241492.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/4047/8629/files/15401228010.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 extracted file (font_00_sfnt_off00006276.bin)

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006276.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6276 5144 bytes
SHA-256: d8656ce3c7afec4afc8d17f70422ff64dd86b5872b4c3b37fba158a1e72eda7f
font_01_sfnt_off00007427.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7427 10484 bytes
SHA-256: 2d57be6f898bb0697640f234315af3f2c1749598b8caeb6e64743fbddde06615
font_02_sfnt_off000097d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97D6 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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