Malicious PDF — malware analysis report

Static analysis result for SHA-256 a703e0f361d1ecd4…

MALICIOUS

PDF

52.2 KB Created: 2020-10-03 02:51:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 0665af723e1bbadefae273b02042d39a SHA-1: f9e41b0abb01aee2c9c5fa498f653b80617a2496 SHA-256: a703e0f361d1ecd44a24cb87cc210ed9b8f3f847cd2bb248273cd2d2bbd44a0a
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ggtraff.ru/strik?keyword=walsin+ceramic+capacitor+datasheet In PDF document text
    • https://site-1036871.mozfiles.com/files/1036871/7246326811.pdfIn PDF document text
    • https://site-1037113.mozfiles.com/files/1037113/pudojenenunirajanidulesis.pdfIn PDF document text
    • https://site-1038582.mozfiles.com/files/1038582/zofujilarumifonikidumina.pdfIn PDF document text
    • https://site-1036661.mozfiles.com/files/1036661/vifutuduwiwigipovaguri.pdfIn PDF document text
    • https://site-1038975.mozfiles.com/files/1038975/70571502865.pdfIn PDF document text
    • http://files.theygavetheirtoday.com/uploads/1/3/1/6/131636632/554c17cf00.pdfIn PDF document text
    • http://files.welshpromscymru.com/uploads/1/3/0/7/130775373/2132631.pdfIn PDF document text
    • http://files.acorn-cookies.com/uploads/1/3/0/7/130775682/9964762.pdfIn PDF document text
    • http://files.wakemanswhitebirchnursery.com/uploads/1/3/1/4/131407711/lemalevemenilamap.pdfIn PDF document text
    • https://site-1038409.mozfiles.com/files/1038409/8089279556.pdfIn PDF document text
    • https://site-1038949.mozfiles.com/files/1038949/vavok.pdfIn PDF document text
    • https://site-1037028.mozfiles.com/files/1037028/fuwezo.pdfIn PDF document text
    • https://site-1037837.mozfiles.com/files/1037837/zuwipakijute.pdfIn PDF document text
    • http://wexixomu.anitasmithacupuncture.com/uploads/1/3/2/6/132683289/dawobom.pdfIn PDF document text
    • http://files.jenasawyer.com/uploads/1/3/1/4/131438641/bezapakes.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
stream_005_off00007bd4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x7BD4 16296 bytes
SHA-256: 09e973e69ef1b8375bd443efeba60a4ca7f052c608fb58e54ea0d763469a8736
font_00_sfnt_off00005fa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FA1 2880 bytes
SHA-256: aff11289bf87f92bc53c0e2abc335208e29b6db8a954e82fd0a5595ffa95d344
font_01_sfnt_off000069df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69DF 5324 bytes
SHA-256: 4df3e6b8bd339292d645dc09d42937301bdb5477f208b37601e1641e28c56e22
font_03_sfnt_off0000aea0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEA0 16060 bytes
SHA-256: d26390a1b495fc4844790f49287189703365677ecb3af67b7cca25d146cf5ea9

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