Malicious PDF — malware analysis report

Static analysis result for SHA-256 27e8957b586c8bab…

MALICIOUS

PDF

45.3 KB Created: 2020-09-18 05:26:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: f4cd16a0da6acec1bb23efd0241fdd37 SHA-1: 3fb23ed98b8e82abbf3fbbdbb9f694bfe5018683 SHA-256: 27e8957b586c8bab31f668874b3106e0f69a8c2ca68fd38c03c1a38c8ed45cfa
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://ttraff.com/wix?keyword=paychex+trueshift+time+clock+manual In PDF document text
    • http://files.w9bro.net/uploads/1/3/1/4/131407005/devimawipos-manutivew-vurufebu-kagumijetepug.pdfIn PDF document text
    • http://files.clevelandpianoteachers.org/uploads/1/3/1/4/131452958/zatalodu.pdfIn PDF document text
    • http://files.sensibleshock.com/uploads/1/3/2/7/132740479/vasesejakukek_faxej_lelikam.pdfIn PDF document text
    • http://files.fitzgerald-and-co.com/uploads/1/3/1/0/131070588/dizotesosu-modeb-veketemive-luzero.pdfIn PDF document text
    • http://files.carpediem-photo.com/uploads/1/3/0/7/130739648/9c86b183723.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/1/0430/7209/4362/files/dress_blues_navy_regulations.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0007/0307/files/nezozenoribazutokigule.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7166/7360/files/85834128342.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5665/9621/files/balancing_chemical_reactions_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5258/1542/files/a_toned_down_stardew_valley.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7437/9157/files/setolaju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1234/1412/files/73384960837.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0466/7952/3493/files/jutukufujuzitukadowadu.pdfIn PDF document text
    • https://9844a9d2-1846-42ab-9811-ec65c13ab572.filesusr.com/ugd/c844bf_8448f81aa22c437da1d00a9a960edfbc.pdf?index=trueIn PDF document text
    • https://e90e550a-8258-4dca-91e8-93e9a7b095e5.filesusr.com/ugd/e643da_b40b3689ad2a42b394f106a0e43aab39.pdf?index=trueIn PDF document text
    • https://0c456b08-7cde-4654-9b9c-1d2bd21c3a9b.filesusr.com/ugd/1a89c8_530924f4a7504292b001463f2ef254ae.pdf?index=trueIn 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000071b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71B8 5356 bytes
SHA-256: 7d0fd3d19e8ebba159a3cfc23698eaef07dd188d3316fe02c5111ada880cb8aa
font_01_sfnt_off000083d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83D1 10712 bytes
SHA-256: 58cc74becd23c646a80a669da98d5cc77526ee73d9d5704e7f93427919affbe0

Open this report in the interactive analyzer, or submit your own file for analysis.