Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d324603130313b7…

MALICIOUS

PDF

75.8 KB Created: 2021-03-24 16:22:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d404c2357eef202cbbec853f77d5011a SHA-1: 8d79668a6f0c71c93efa83ef61ada39fdb9e5efa SHA-256: 6d324603130313b79d41b1f280a154adb1c57b32db3104fbf7163880d6428fc8
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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://jacksth.ru/wix?keyword=managing+human+resources+16th+edition+pdf+free+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4410214/normal_5fe2879f5a7fe.pdfIn PDF document text
    • http://esportzmlevent.com/how_to_set_timezone_on_lacrosse_atomic_clockh4lha.pdfIn PDF document text
    • http://btsworld.org/wezinodovywpf.pdfIn PDF document text
    • https://tupefumezamubew.weebly.com/uploads/1/3/0/8/130874634/d77049bfa.pdfIn PDF document text
    • http://lutefadeba.scienceontheweb.net/tablatura_bohemian_rhapsody_guitarra.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4531523/normal_5fcaa988ecf96.pdfIn PDF document text
    • https://kunobutos.weebly.com/uploads/1/3/4/2/134234797/dewober_vemugevabav_xulizodiza.pdfIn PDF document text
    • https://gitutibilaralib.weebly.com/uploads/1/3/1/3/131384503/wigunekavikij.pdfIn PDF document text
    • http://vimobewawulipiz.mypressonline.com/curriculum_development_and_design_murray_print.pdfIn PDF document text
    • http://talobaniwi.iblogger.org/daril.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388038/normal_602cfe0ceb094.pdfIn PDF document text
    • http://zekojotewakugag.mypressonline.com/what_do_you_do_at_a_orientation.pdfIn PDF document text
    • http://betflixguvenilirmi.com/18471069161hoam6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373511/normal_5ffc3307a23f2.pdfIn PDF document text
    • https://xufujume.weebly.com/uploads/1/3/4/8/134851049/xexazuvedanub.pdfIn PDF document text
    • https://gejixivipoza.weebly.com/uploads/1/3/0/9/130969358/kotosopedeve-xeditira.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425005/normal_5fd9bc4051e6a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rutuvofogiseba.epizy.com/harry_potter_y_el_prisionero_de_azkaban_edicion_20_aos.pdfIn PDF document text
    • http://liviwofuxa.epizy.com/algebra_1_worksheets_math_aids.pdfIn PDF document text
    • http://sebuzozogari.epizy.com/34645479444.pdfIn PDF document text
    • https://s3.amazonaws.com/dudujopixejikug/97014022282.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/athlean_x_max_shred.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e47e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE47E 5872 bytes
SHA-256: 8be8e37d83224664b7b16a862f679870de53e14313ba9e2bf76c61ca2e9fcb8f
font_01_sfnt_off0000f878.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF878 12136 bytes
SHA-256: e592945c2011b8b482db736a21f16c770cf5df6b70199cdc4e06ac0722848a01

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