Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d1b6ea3845e378a…

MALICIOUS

PDF

42.0 KB Created: 2020-10-10 19:25:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 596c5227f6d35497bce9bd6eca5f54ff SHA-1: df837c1aee61a97c86188f57435252ed8597ae3f SHA-256: 9d1b6ea3845e378abe3a35d330f1094d61a8066b4dbddf92869165916d8d7a71
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/strik?keyword=banjara+whatsapp+status++mp4 In PDF document text
    • http://files.fijideaf.net/uploads/1/3/2/7/132740564/lotesowogivafugewoku.pdfIn PDF document text
    • http://files.cfletcherphotography.com/uploads/1/3/1/3/131398412/pisejerozoxatejoz.pdfIn PDF document text
    • http://jutofi.469bce.com/uploads/1/3/1/3/131398425/dalobolexisus_norupozakesi_fumobob_wusuwuwoz.pdfIn PDF document text
    • http://xelezof.jsihomeinspections.com/uploads/1/3/0/7/130776728/b7c9279fd83ab.pdfIn PDF document text
    • http://files.chargerchoir.com/uploads/1/3/0/7/130776487/9216963.pdfIn PDF document text
    • https://site-1037169.mozfiles.com/files/1037169/82928713919.pdfIn PDF document text
    • https://site-1041682.mozfiles.com/files/1041682/55434195776.pdfIn PDF document text
    • https://site-1036679.mozfiles.com/files/1036679/54101117296.pdfIn PDF document text
    • https://site-1039210.mozfiles.com/files/1039210/65000649653.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/1/0498/3380/3931/files/lubuwizegilodug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/7770/8197/files/jolujom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5899/4088/files/66361913133.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/3378/3203/files/coleman_rechargeable_quickpump_not_charging.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2148/3687/files/15-f387wm_ram_upgrade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/4816/0411/files/kiratto_pri_chan_dia.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004935.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4935 5332 bytes
SHA-256: c4c76fea98ccb00c91e41dd63c8997ff819d30189f04d0a749b798cb2b38d489
font_01_sfnt_off00005b3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B3C 2044 bytes
SHA-256: e8def34ef7fa1cd1e737aa53281a1ad4be732a20e453453846aa670fb207f4af
font_02_sfnt_off000064a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64A8 9532 bytes
SHA-256: 67b18e98ef4d8bfabdad368f5a8598c3edf27c4255a2c9332ca6d8dd96cf9e86
font_03_sfnt_off00008567.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8567 16060 bytes
SHA-256: d78d7cc1a68daa951b4fbccbcfb906d5a08ad384f187125596154666a45abe72

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