Malicious PDF — malware analysis report

Static analysis result for SHA-256 3384868f6b3b5666…

MALICIOUS

PDF

102.0 KB Created: 2021-03-14 19:11:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 5457a3c0039a742b82e354fbb350ec98 SHA-1: 90ce36d409ab24a4427edadeaaf0941363516cf0 SHA-256: 3384868f6b3b5666ffe8f3bac2e7ed57dc57c5f04dbfe2ee66c5a7e77c7e9ea6
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains a large number of external links, many pointing to PDFs with numeric slugs, suggesting a link farm or SEO manipulation tactic. The presence of an embedded URL and the 'SE_DOWNLOAD_BUTTON' heuristic indicate a lure to download further content, likely malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9959

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://fokemale.ru/123?utm_term=adobe+illustrator+10+bangla+pdf PDF link annotation
    • https://cdn.sqhk.co/nalawanuxa/ld1SLxC/99432886145.pdfIn PDF document text
    • https://cdn.sqhk.co/vasegodesazu/bggjcQs/60197999786.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379379/normal_6048684014843.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469836/normal_603f2af234168.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445888/normal_5feda2449890d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445115/normal_5ff049317ef56.pdfIn PDF document text
    • https://cdn.sqhk.co/zovitamojim/hcKufgg/sekeliriwezazadimose.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410976/normal_5fe6dd848f0ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481408/normal_60342ee933876.pdfIn PDF document text
    • https://cdn.sqhk.co/moxinivo/9ieigFt/30379248673.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450634/normal_5fcdb827a029e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426815/normal_5fda2f2b42620.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365660/normal_60026ace42694.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491153/normal_6044da73eef0c.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://uploads.strikinglycdn.com/files/0262124d-d60e-482c-9211-4d762a82748c/83643788311.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/323e1776-f385-4435-a9c0-a248a878976a/14193879080.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/274fa324-61e7-485c-bdb4-5e22f0b9a662/timukadulunika.pdfIn PDF document text
    • https://edefa294-c65c-46c5-840b-8a4669b9fdfe.filesusr.com/ugd/e4a001_23b07f99a09e4b3594805158505e8f60.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad526f93-73d0-4471-b3f0-fcc27fbace7b/all_marketers_are_liars_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f8e3928-3602-4609-b91a-804b45a01b92/sketchup_make_free_2017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f811b29f-8180-4944-9944-351e658f244d/dolivukukidezigiluge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8677e5c2-2029-46e7-985b-0f243f213e33/giloz.pdfIn PDF document text
    • https://58960a86-a3f4-42d8-866e-ee2cf32068b1.filesusr.com/ugd/1ad962_7fbdcc2979574dda83cffcbc7ea71c49.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/df21167b-4205-4b40-ab91-e6e7633a3bf3/operations_research_undergraduate_degree.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04b76150-419a-4386-9e8c-b9ba4fb59dc4/garmin_vivofit_jr._2_aktivitetsur_star_wars_dark_side.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000108f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108F7 6744 bytes
SHA-256: b29f9350a720d2da9dc50567d08c4a82684db1fcb28a47e3a5788345b392d808
font_01_sfnt_off000119dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119DC 5532 bytes
SHA-256: c81307f16ac37898e4a23e70b2c69b8f1afc6885c41864a086341b5d0cd34241
font_02_sfnt_off00012cb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CB4 5572 bytes
SHA-256: 672b06a4675bfaead0cd0e3ec9a6f899703e5ac4f6f3ddb7a5effa109ad60fc2
font_03_sfnt_off00013e5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E5C 2712 bytes
SHA-256: 1d9a322094317d60b0517f4b29932a1e3c29e19820cef0e95a5e09526b826bb7
font_04_sfnt_off000149fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149FE 11732 bytes
SHA-256: c3e00f2e51aa830f7b807a2743a5ae8750544c8ff1eec323b837f03907132db8
font_05_sfnt_off0001726a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1726A 16476 bytes
SHA-256: ac57c68af8163708d8b7e92f3da1c826550d3d8f2b6749645b61b59a38b9461d

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