Malicious PDF — malware analysis report

Static analysis result for SHA-256 96c000205d6ee66d…

MALICIOUS

PDF

76.2 KB Created: 2021-02-21 08:02:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 458d7e6f7d38fa2e176729889c3a8327 SHA-1: e204904719c6b7c3f559ec51a398db8e121019ae SHA-256: 96c000205d6ee66deab19d7c4bfef90ac92a5f7b0bd1a960e165a582b7410613
244 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links pointing to various disposable domains and file-sharing services, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://yafferge.ru/strik?utm_term=the+crown+cast+diana%2527s+granny In PDF document text
    • https://nexevakef.weebly.com/uploads/1/3/5/3/135327015/fopigorelobajuro.pdfIn PDF document text
    • https://cdn.sqhk.co/mulepava/Jgijigj/kinekepinakerugagud.pdfIn PDF document text
    • https://cdn.sqhk.co/zarejesorufo/hwrc2jh/bujanunofugenofufa.pdfIn PDF document text
    • https://cdn.sqhk.co/rigizisojix/hgcukua/make_homemade_bug_spray.pdfIn PDF document text
    • https://cdn.sqhk.co/fakineduxafe/izEThca/bad_day_lyrics_justin_bieber.pdfIn PDF document text
    • http://munupesifak.22web.org/asking_for_information_about_a_job.pdfIn PDF document text
    • https://kagamufoxigog.weebly.com/uploads/1/3/4/0/134013308/779c73bf69cf459.pdfIn PDF document text
    • https://vulabomanuxuw.weebly.com/uploads/1/3/4/8/134857085/xemafoxajetog-momixozal-kulire-midisized.pdfIn PDF document text
    • http://atomyimperial.ru/comprehension_for_class_10_with_answersq9bl2.pdfIn PDF document text
    • https://pejopazuzaguwoz.weebly.com/uploads/1/3/2/8/132815183/9100686.pdfIn PDF document text
    • https://cdn.sqhk.co/kurotevu/idqIX3W/tom_and_jerry_movie_2021_twitter.pdfIn PDF document text
    • https://cdn.sqhk.co/zobarimumuje/6VG7Gie/13322501199.pdfIn PDF document text
    • http://qupieasy.online/construction_math_worksheets5p3di.pdfIn PDF document text
    • https://cdn.sqhk.co/noluxokeruma/hb4Jhi5/survival_rate_for_pancreatic_cancer_with_chemo.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
    • http://kezijewuzal.epizy.com/rental_property_damage_report_template.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e05f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE05F 5136 bytes
SHA-256: 0a1e0509dcf285b280c52a850e8ac740717632b49c2510f3d328a2bbdd368a07
font_01_sfnt_off0000f1e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E5 10572 bytes
SHA-256: 63ea53b86f1140e6576ba80187d22f088e6bc579a109143a37293c18bc5d9361
font_02_sfnt_off000115d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115D9 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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