Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe37ba64877aa39c…

MALICIOUS

PDF

42.4 KB Created: 2020-10-26 23:06:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 7c8b885174704185cba2a54e4dacf03f SHA-1: b9ed3cf34fb76c14baf4aa9977287942c7921239 SHA-256: fe37ba64877aa39ce163d6fd70c52742b60e22887963d37921fa0a362f6d3e56
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/123?keyword=robert+burns+to+a+mouse+english In PDF document text
    • https://fanavepuru.weebly.com/uploads/1/3/1/8/131871984/guvugatobikak_loxibifi_naguzepofus_rikul.pdfIn PDF document text
    • https://porimejonawi.weebly.com/uploads/1/3/4/3/134368737/feduxemume.pdfIn PDF document text
    • https://zoveponezewuda.weebly.com/uploads/1/3/0/7/130738822/3909426.pdfIn PDF document text
    • https://mipirizu.weebly.com/uploads/1/3/2/6/132682564/8e398326d8b96b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379961/normal_5f8ba3346898f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411273/normal_5f96d340bce3b.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006736.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006736.bin)
    • https://cdn.shopify.com/s/files/1/0493/4202/1791/files/can_apple_airpods_connect_to_android_devices.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9879/0301/files/pezosofedefugositekokul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/3272/2599/files/dekebusepukututegoxatubop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/3739/1510/files/wilebugemijerowulolal.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/90866048766.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/5639/8246/files/streaming_musica_gratis_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3659/7663/files/9867083146.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/7069/6855/files/jifebunaturijerukakowob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5725/7889/files/kadugomupoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9929/4369/files/elements_of_real_analysis_denlinger.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_off00006736.bin)

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_off00006736.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6736 5248 bytes
SHA-256: 25fa137884f397135c596141e08552fbdd516a9ec76e7ed5b950c120ff3d37f5
font_01_sfnt_off000078dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78DC 10524 bytes
SHA-256: c1e80d6e0dc3c6400ea37888b3997a6bdcc49198db0ea0c9cf8436daeed1238a

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