Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2c8c86cefbca074…

MALICIOUS

PDF

62.7 KB Created: 2020-10-07 22:09:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: f9b4381d3033d82c5299a50d6a80348c SHA-1: 5b6a8809dbc8c18c8c6ea91d60ffe59b9eebb847 SHA-256: e2c8c86cefbca0743e2b791af00218c68ec9167ccb75bbaf1bb363ee0ec61cc4
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://gettraff.ru/strik?keyword=dhanvantari+ayurveda+books+in+telugu+pdf In PDF document text
    • http://nunoba.fcsirocco.org/uploads/1/3/0/7/130775853/cd071fa1b3.pdfIn PDF document text
    • http://files.14skydesign.com/uploads/1/3/0/8/130874058/6402850.pdfIn PDF document text
    • https://site-1040144.mozfiles.com/files/1040144/sagodewulasuv.pdfIn PDF document text
    • https://site-1038303.mozfiles.com/files/1038303/gibogokubajejufinawom.pdfIn PDF document text
    • https://site-1036783.mozfiles.com/files/1036783/lutepawuv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9795/6258/files/vojimapo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/6656/4254/files/91566536147.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/1497/4372/files/90718206195.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42bc7b2d-738f-4d5e-ba91-70114dc78642/xetode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8eb5b10-d377-40df-91c8-a2cba0fe8dc3/8906747498.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef227e5d-b2d2-47b0-8c61-5cbbb2cfbc9b/vorikadotuginajumumonirom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49f54ffe-53ea-4a8e-80c6-af9faa0fbe20/nizisakiwa.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://sinhala.sourceforge.net/In PDF document text
    • http://sinhala.cvs.sourceforge.net/viewvc/*checkout*/sinhala/sinhala/fonts/CREDITSIn PDF document text
    • http://www.gnu.org/licenses/gpl-2.0.htmlIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69EF 5668 bytes
SHA-256: e50068d62caba1bf79e2c75a226b80c3471e4a0951cf911d9d64f38b11936fb2
font_01_sfnt_off00007d43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D43 3772 bytes
SHA-256: b9b49a3c453c53986d7a61d4291ac5a87065d82ff96be43ef0dca6427e6dc540
font_02_sfnt_off000088a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88A6 7124 bytes
SHA-256: 68ec7ff9ce4ba694a2778a88febadaa88a3bd2b43280f40ec74d6ba59a9b1e9f
font_03_sfnt_off00009f44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F44 14496 bytes
SHA-256: 44affc75c8b68c65eff7f7bcb84ccba98e501a4017225759e0c3f13e92553833
font_04_sfnt_off0000ca9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA9B 10648 bytes
SHA-256: 9090e1a3c47f0de5e83198b1500c0e93d62107bd6ddd5a25e23cb17a5c1ff40f

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