Malicious PDF — malware analysis report

Static analysis result for SHA-256 c84d587677ccc59a…

MALICIOUS

PDF

129.9 KB Created: 2020-12-28 06:56:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 18223ede9b26ac46035ac77ca5a8c34f SHA-1: 9d0aede1da9dd00be68959f124202fe58014a232 SHA-256: c84d587677ccc59adbd0587284656717e387c659cc0d5b3018696364b6d04089
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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?utm_term=old+keyboard+to+ps2+adapter In PDF document text
    • https://cdn.sqhk.co/zikegasenar/6Hjfjcx/59660917161.pdfIn PDF document text
    • https://ladubikoniku.weebly.com/uploads/1/3/0/9/130969526/domejivufe.pdfIn PDF document text
    • https://vufizirisabewi.weebly.com/uploads/1/3/4/4/134443644/zotugilifiw.pdfIn PDF document text
    • https://funogumoduwe.weebly.com/uploads/1/3/4/3/134309977/vigan.pdfIn PDF document text
    • https://cdn.sqhk.co/wemonamo/cgigigQ/pulling_tv_show_watch_online.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406456/normal_5f9abca331208.pdfIn PDF document text
    • https://cdn.sqhk.co/xufatirumina/Rhcif9F/survivor_island_of_the_idols_controversy.pdfIn PDF document text
    • https://jotinebemoti.weebly.com/uploads/1/3/4/6/134681432/7538122.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://s3.amazonaws.com/donukadizolin/apex_launcher_classic_apkpure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ecc1fec-65b8-468e-b835-4ea586b1873f/zawulawozaletuwezoz.pdfIn PDF document text
    • https://s3.amazonaws.com/wusigipufuvowix/6965396946.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/415038e2-a2ec-439a-9ff9-26d08d3ac422/angela_aguilar_noche_de_paz_acordes.pdfIn PDF document text
    • https://s3.amazonaws.com/gedexim/tebasalibovi.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/radurusi.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000198f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x198F7 5052 bytes
SHA-256: f61505789bd7ca2bceb653853421e4546f6ba376536d54bb22f02994206f247e
font_01_sfnt_off0001aa3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AA3B 12228 bytes
SHA-256: 3e3f5152dae1828457b53d9c15f728028ec279f9feb459d7f22130e64e3144a2
font_02_sfnt_off0001d42c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D42C 16860 bytes
SHA-256: 5d8c30ddff66e627d024d6c1d9a8285d990d8fb06b67af6d7f0995e3827ea965
font_03_sfnt_off0001ec13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EC13 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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