Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd07be524969a6bd…

MALICIOUS

PDF

76.7 KB Created: 2021-02-11 14:59:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 82c31d474ea1212644f603b23acfb739 SHA-1: 2ab7d6209d3f0e9af854f06a5a242e15d3927b65 SHA-256: dd07be524969a6bdee88aa508a99131dd5f7519d5da627b77fd88a14d49124a0
244 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting or known redirectors, indicating a link farm designed to lead users to malicious sites. Heuristics confirm the presence of malicious redirector links and a link farm structure. The ClamAV detection and ML classifier further support its malicious nature, likely as a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://crophysi.ru/123?utm_term=download+movies+google+sites In PDF document text
    • https://cdn.sqhk.co/fumamimed/ibQhbhc/lebefeb.pdfIn PDF document text
    • https://cdn.sqhk.co/lijuwezasip/icgjgec/stickman_battle_mod_apk_unlimited_money_and_gems.pdfIn PDF document text
    • https://cdn.sqhk.co/vamunidibu/fhfghjO/chc_checklist_form_word_document.pdfIn PDF document text
    • https://bewokeramubi.weebly.com/uploads/1/3/1/6/131636949/jawop-kodaturokid.pdfIn PDF document text
    • https://rajuvafawomok.weebly.com/uploads/1/3/4/4/134455823/6656881.pdfIn PDF document text
    • https://cdn.sqhk.co/bufutoje/gfii3tz/4761853910.pdfIn PDF document text
    • http://dovavetupal.22web.org/muslimah_cartoon_picture.pdfIn PDF document text
    • https://cdn.sqhk.co/bilanogakiw/djgWFrj/83583422594.pdfIn PDF document text
    • https://cdn.sqhk.co/linotepibubi/zhe1hdY/jalek.pdfIn PDF document text
    • https://vinipuzi.weebly.com/uploads/1/3/0/7/130776781/viwedigolijun.pdfIn PDF document text
    • http://bezigex.iblogger.org/im_injection_administration_guidelines.pdfIn PDF document text
    • https://cdn.sqhk.co/gegenosuzun/ihShjie/wikipedia_nearby_api.pdfIn PDF document text
    • https://cdn.sqhk.co/bovokolel/DgdG5je/38585936798.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/vuzufexarevima/kisavadipotumewojadeze.pdfIn PDF document text
    • http://pazixurofuni.epizy.com/explore_learning_gizmo_answer_key_collision_theory.pdfIn PDF document text
    • https://s3.amazonaws.com/divelatoxa/27773534486.pdfIn PDF document text
    • http://zotawof.rf.gd/56986517828.pdfIn PDF document text
    • https://s3.amazonaws.com/nawuvud/77490444625.pdfIn PDF document text
    • http://romevakamijoke.epizy.com/philips_respironics_dreamstation_cpap_with_humidifier_manual.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_off0000f144.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF144 5200 bytes
SHA-256: 99efe45e5afcdad23ac94f1c28a422285eb822a820be3b99a8a3bdbc27223220
font_01_sfnt_off00010306.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10306 10124 bytes
SHA-256: 28a9f5e394afdedfa76f0ba153b015afe2c2f2a6d1c4c7a4363bd7a4ccf46388

Open this report in the interactive analyzer, or submit your own file for analysis.