Malicious PDF — malware analysis report

Static analysis result for SHA-256 7634734d22f8f81b…

MALICIOUS

PDF

71.4 KB Created: 2021-02-24 08:08:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: de3c33f93ffd045438238ce12b934f80 SHA-1: 4be2524fd0969fbdf83c4242a3916a1edb56d6be SHA-256: 7634734d22f8f81b8a6ebc9214d0ee74b4d4e4de383743a63bcde274d1739136
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The embedded content, though heavily obfuscated, appears to be related to search terms like 'Camera galaxy s4 apk', indicating a lure for users seeking specific information, likely leading to phishing or malware download sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • 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.
  • 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://bologen.ru/wix?keyword=camera+galaxy+s4+apk PDF link annotation
    • https://rurusoweloxefug.weebly.com/uploads/1/3/3/9/133989150/bezewa_wijadol_majuzizawil.pdfIn PDF document text
    • https://komiwafaka.weebly.com/uploads/1/3/2/7/132712661/2028792.pdfIn PDF document text
    • https://gozerezujokosas.weebly.com/uploads/1/3/4/8/134856803/6201681.pdfIn PDF document text
    • http://xodulik.66ghz.com/89808112971.pdfIn PDF document text
    • https://kosilamegorigi.weebly.com/uploads/1/3/1/4/131409210/7871333.pdfIn PDF document text
    • https://mapilezije.weebly.com/uploads/1/3/5/3/135322213/nubojularerefawozepo.pdfIn PDF document text
    • https://mavakonagidesa.weebly.com/uploads/1/3/1/4/131483278/rorerejipekuza.pdfIn PDF document text
    • https://sovanomi.weebly.com/uploads/1/3/5/3/135337195/nufodezo.pdfIn PDF document text
    • https://tunibedexorole.weebly.com/uploads/1/3/5/3/135350281/madudeka_repop_muramuzine_poxojurapolaz.pdfIn PDF document text
    • http://zelopaqq.xyz/86842468756g6qz7.pdfIn PDF document text
    • https://nazoturifebigik.weebly.com/uploads/1/3/1/6/131606271/vopox.pdfIn PDF document text
    • http://vbnmcxz.xyz/cessna_citation_maintenance_schedulepzhog.pdfIn PDF document text
    • http://national-verifyteam.com/how_to_turn_on_jlab_jbuds_air_executive4kbzu.pdfIn PDF document text
    • http://kabomodom.iblogger.org/kobuzu.pdfIn PDF document text
    • http://myfavoritesun.xyz/63125493130zuc05.pdfIn PDF document text
    • https://situtewazugigev.weebly.com/uploads/1/3/4/2/134265876/483018.pdfIn PDF document text
    • http://workmonster.net/bupropion_dosage_formszr8wn.pdfIn PDF document text
    • http://7gusevshop.website/age_of_sigmar_realms_of_battle_rulesh3f25.pdfIn PDF document text
    • https://wavasifowimuzog.weebly.com/uploads/1/3/5/3/135321241/rivinimigab-sabepivoximi-ridefuzazem-jawezaguvanu.pdfIn PDF document text
    • http://imedo.ru/sap_blueprint_template_wordiipz6.pdfIn PDF document text
    • https://niravewowinud.weebly.com/uploads/1/3/5/3/135343761/2234797.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://surigel.rf.gd/76342761277.pdfIn PDF document text
    • http://bexamunexena.rf.gd/wagupexowofegipovo.pdfIn PDF document text
    • http://ruxetetimaxozur.rf.gd/16398865706.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_off0000db3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB3F 5368 bytes
SHA-256: d4229159ed94ff11cf1fea6ebdd4d8fc835c333c069f35c1df49299b0887031c
font_01_sfnt_off0000ed7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED7E 10184 bytes
SHA-256: 78c107cb0cc8a2dc61f4d42c5c398a1ced43be63c311421b4ed07871ad3f8e95