Malicious PDF — malware analysis report

Static analysis result for SHA-256 824c77ee5026c397…

MALICIOUS

PDF

105.4 KB Created: 2020-11-30 08:49:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 9906b6f819b9350ada0a1dfd449ab0fe SHA-1: 90a278288e6b6e0ed1edf2c2ebb359ef7d9c38b8 SHA-256: 824c77ee5026c397949f744f825cfc63141a1037e828956ac77a47a02faa8c9e
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 0.9989

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://traffmen.ru/strik?utm_term=bts+the+most+beautiful+moment+in+life+part+2+release+date In PDF document text
    • https://saxibodusazo.weebly.com/uploads/1/3/0/7/130740440/bufaloxad.pdfIn PDF document text
    • https://miwidekufaxojud.weebly.com/uploads/1/3/4/7/134753597/piregisuxipizurujagu.pdfIn PDF document text
    • https://vebifejelib.weebly.com/uploads/1/3/0/7/130775119/zisew.pdfIn PDF document text
    • https://tijesefufejeje.weebly.com/uploads/1/3/4/8/134858706/negizovuj.pdfIn PDF document text
    • https://jopalezaleloloj.weebly.com/uploads/1/3/1/3/131380469/b6e8daf48c60cf8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vojapu/erasmus_mobility_student_application_form.pdfIn PDF document text
    • https://s3.amazonaws.com/wunojipu/piduresakurinapewuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26cf92fb-2bb2-47b9-ab40-b3be706ea53e/hardy_weinberg_equilibrium_practice_problems.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/sowuxazakapepugilake.pdfIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/jimmy_mcclain_ridgeway_high_school_tn.pdfIn PDF document text
    • https://s3.amazonaws.com/lumixi/xowoxerujolibud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fe13c0d-8548-4d30-ace9-f88dc80bfaf9/47641226528.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010e74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E74 14164 bytes
SHA-256: c99cc3a529b722dc2e3d6a86515638ddd21764a9df45db6d212f5b11081fe81e
font_01_sfnt_off00013bcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BCB 5600 bytes
SHA-256: b94661b3b827cdf69395d41c392a19fcdee145207868cd47c2828d87f5514223
font_02_sfnt_off00014ea0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EA0 3720 bytes
SHA-256: 6539b129c5cd894636dc8f40f53a156c00c8f46378ab4f137c96d687a1cff6ed
font_03_sfnt_off00015a03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A03 11068 bytes
SHA-256: d8428dac7468180853b77420e2eeb1d880ea957abb1990ccf7231f1c1957a861
font_04_sfnt_off00018001.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18001 16092 bytes
SHA-256: ea75db71c9df7250347a03039f742fcd189f5fc3f08964e696816fa8b5227073

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