Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a1e2248979b3483…

MALICIOUS

PDF

77.0 KB Created: 2021-05-06 05:34:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 5a71787fbbc49946d2350726121857c9 SHA-1: 43fa8c7854d8ba2d06389fb43d46876c70705e2d SHA-256: 0a1e2248979b3483364f0a0e3061afc3795000fd8dad185b2a2171d8191200ce
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. One embedded URL points to a domain associated with game patches, likely a lure to entice users to click on malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://mezovuduw.ru/strik?utm_term=sword+art+online+alicization+lycoris+patch+xbox PDF link annotation
    • http://santecmb-sarl.com/jejepagabifadopa5bmgr.pdfIn PDF document text
    • http://tadugebakonuged.getenjoyment.net/nojuzofusuxiburadanimo.pdfIn PDF document text
    • http://fipagolanikobax.mygamesonline.org/icao_english_proficiency_test_sample.pdfIn PDF document text
    • https://wemivera.weebly.com/uploads/1/3/4/3/134311686/junukik.pdfIn PDF document text
    • https://vapaniwagivu.weebly.com/uploads/1/3/4/4/134442769/menima-zofejubuzoreto-punom-movesedit.pdfIn PDF document text
    • https://sivisobimiji.weebly.com/uploads/1/3/4/7/134754783/jekumovubet.pdfIn PDF document text
    • https://tuwuribo.weebly.com/uploads/1/3/6/0/136027226/kipejulezonexijubuju.pdfIn PDF document text
    • https://kaferafodi.weebly.com/uploads/1/3/0/7/130775544/3437125.pdfIn PDF document text
    • https://dowixedazu.weebly.com/uploads/1/3/1/4/131409709/c993c2d60.pdfIn PDF document text
    • http://reduslim-italiaoficial.site/521819864933rg7d.pdfIn PDF document text
    • https://cdn.sqhk.co/repudodo/hbSeWws/jolez.pdfIn PDF document text
    • http://tujubafi.getenjoyment.net/nufefibe.pdfIn PDF document text
    • http://lnstagram-helping.live/how_to_make_chicken_nuggets_crispy_againrq9kw.pdfIn PDF document text
    • https://riligasiguvenu.weebly.com/uploads/1/3/5/3/135392009/118ceb0.pdfIn PDF document text
    • https://fizakisel.weebly.com/uploads/1/3/4/4/134402115/xaradalalaroki-fuxebem.pdfIn PDF document text
    • https://jukatuve.weebly.com/uploads/1/3/2/7/132741058/e7e353c7.pdfIn PDF document text
    • https://cdn.sqhk.co/gabadifofibo/ixbAGvf/driving_zone_russia_apk_android_oyun_club.pdfIn PDF document text
    • https://cdn.sqhk.co/nufesewepi/f8fYjjb/psoriasis_on_face_only.pdfIn PDF document text
    • http://iglivesupportteam.com/81167624745p82ak.pdfIn PDF document text
    • https://bofejaximolapob.weebly.com/uploads/1/3/4/7/134751884/71d36e7d32ecc1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://73a1781f-5c9f-4c76-8a11-a8e8c44f336a.filesusr.com/ugd/d9f7b5_76956f8ac6c94625ab0ecb5568041c8c.pdf?index=trueIn PDF document text
    • https://01d7ec8a-e38e-4e33-8c76-1be31754498b.filesusr.com/ugd/24d943_09f9584187d5457eaf7b75d0147f0d9e.pdf?index=trueIn 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_off0000eb6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB6C 5716 bytes
SHA-256: 94aa9a46da796dbf4796e01257807dbbed0e410fa592d59ece37cb57bbb3497c
font_01_sfnt_off0000fef8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF8 12076 bytes
SHA-256: 79acb0a0a8d4940ed223c49d588d0c0a86ba7b58e242e7e28f604c797dd87576