Malicious PDF — malware analysis report

Static analysis result for SHA-256 81f3f7503e161f3e…

MALICIOUS

PDF

46.1 KB Created: 2020-08-14 19:08:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 64101ee977c9f62fa74626c44000b83a SHA-1: 6266137b0610257510f290bd09ed4dc0ec9fa65e SHA-256: 81f3f7503e161f3e002f91886d0c7bddc710d50db8bb869933dcbdad30327442
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.ru/pify?keyword=black+and+white+background+punjabi+status In PDF document text
    • http://files.stephaniekaza.com/uploads/1/3/2/6/132696174/976fd77f07e6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5702/0056/files/unity_stencil_buffer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gefoviliruvowej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2801/2456/files/bon_bon_poe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4693/5447/files/fedelilivunekit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1663/1973/files/zomuvekedizodepo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2683/0744/files/88557258561.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5777/3728/files/javoronobawim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3916/1500/files/al_almohadon_de_plumas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0079/1191/files/adjoint_matrices.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8085/1364/files/gegevesibixadudibakedutu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6308/3170/files/61203212271.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0611/6511/files/gulerigavodopesabixifow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6461/4303/files/42847179720.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000049c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49C1 5640 bytes
SHA-256: fe10c6bdcb8c96104febd1f9d5c4cc0385a7d56a3e66edf632906b5d1a5d31bc
font_01_sfnt_off00005ce3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CE3 2080 bytes
SHA-256: d986bc4f9bc36c17e04f2cc7da5a5b1ef1ed396aedebfb8118b1389354925da6
font_02_sfnt_off0000667a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x667A 9564 bytes
SHA-256: f3089ec2961254c08520385f4cbdec81c6c4c05d6f3141273967e40d0fe4bcda
font_03_sfnt_off0000875e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x875E 16180 bytes
SHA-256: 7c776e5eea023699f371194d12e6bf94cc07d0f218a2e329aa39d16e66640f7a
font_04_sfnt_off00009c76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C76 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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