Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dac7b907c2badff…

MALICIOUS

PDF

70.8 KB Created: 2021-02-07 20:54:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 13850e4c41d48dcd07089ddc7f3ecbe0 SHA-1: 59849e5f84d0a9cde9ec31cd94d14a57421d4c60 SHA-256: 1dac7b907c2badff79782997be3fd94a34edcf94df1b32504207a05ae2775254
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF that contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/aws?utm_term=alone+movie+song++320kbps PDF link annotation
    • https://cdn.sqhk.co/dedogupazib/wieDicE/forest_wallpaper_for_walls.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417123/normal_6018a580045d8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472484/normal_5fe24ea8916b5.pdfIn PDF document text
    • https://warazafipa.weebly.com/uploads/1/3/1/3/131381481/f6769bcbf23112.pdfIn PDF document text
    • https://suzexefovewav.weebly.com/uploads/1/3/4/6/134640410/bukosuminijuxeted.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409627/normal_5fddded4adc95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412774/normal_6011808b53a65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406771/normal_6010a83356ceb.pdfIn PDF document text
    • http://nelunufibedu.iblogger.org/android_network_on_main_thread_exception_asynctask.pdfIn PDF document text
    • http://vibubag.22web.org/ruwejewifunevovupove.pdfIn PDF document text
    • https://cdn.sqhk.co/dagufiwus/ieaigRJ/top_horror_zombie_games.pdfIn PDF document text
    • http://zokumujanuni.iblogger.org/yousufguda_weather_report.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://luxixeg.epizy.com/bookkeeping_and_accounting_crash_course.pdfIn PDF document text
    • http://fekuzigide.epizy.com/zunuxiga.pdfIn PDF document text
    • http://puvusevakap.epizy.com/data_mining_tutorial_point.pdfIn PDF document text
    • http://tozuduxaxikagik.rf.gd/25564652150.pdfIn PDF document text
    • http://vepejatudededok.rf.gd/89980857865.pdfIn PDF document text
    • http://betiravel.epizy.com/25819825008.pdfIn PDF document text
    • http://jonapepubenej.epizy.com/bulloch_telephone_tv_guide.pdfIn PDF document text
    • http://ramufezumax.rf.gd/xufasifirutenononab.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d63e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD63E 5524 bytes
SHA-256: f6c51e8d3e180f5db23eea27b093b62eda3b725afac2a7d6123a8771daf92a53
font_01_sfnt_off0000e907.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE907 10968 bytes
SHA-256: 56b17614566f3cb8a01079113c3b6045913f425e4a277c5fdebce58fddcceca7

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