Malicious PDF — malware analysis report

Static analysis result for SHA-256 acde748b9f49955c…

MALICIOUS

PDF

171.1 KB Created: 2021-06-07 08:40:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: e6e2a36e42b74c82bc23b53963a86bdd SHA-1: 48b6290d02e44788cd014f145a0d26d3701af55e SHA-256: acde748b9f49955c808f45d54a6ecba37c9a02d97a3d632e7505b7970f592bc2
126 Risk Score

Malware Insights

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

The sample was detected as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains numerous embedded URLs pointing to disposable hosting services, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and the ML_NYX_PDF_MALICIOUS heuristic strongly support a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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 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://allytemp.ru/pbw?utm_term=what+are+the+main+themes+in+the+merchant+of+venice PDF link annotation
    • https://webutukokixomuw.weebly.com/uploads/1/3/5/3/135317122/xovorixa.pdfIn PDF document text
    • https://fezuwarojeti.weebly.com/uploads/1/3/1/3/131383544/kulavet-suwazel.pdfIn PDF document text
    • https://busonuvawariba.weebly.com/uploads/1/3/4/3/134355681/sogesugigif.pdfIn PDF document text
    • https://duzofonateras.weebly.com/uploads/1/3/4/4/134494902/wutatotumu.pdfIn PDF document text
    • https://xixutusolorul.weebly.com/uploads/1/3/4/6/134685478/tosewazux-zemibumavepilu-kufisikumowedu-kezaxobul.pdfIn PDF document text
    • https://miwejezapelo.weebly.com/uploads/1/3/4/3/134342363/9229285.pdfIn PDF document text
    • https://likuwiwekadu.weebly.com/uploads/1/3/1/8/131857000/4994985.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496148/normal_60498e90443e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386852/normal_603c6941c8c1f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366340/normal_604a216b7bbb4.pdfIn PDF document text
    • https://zofiludel.weebly.com/uploads/1/3/5/3/135347527/8436018.pdfIn PDF document text
    • https://mulidugegobivim.weebly.com/uploads/1/3/4/3/134318636/tizugus_nozedojada_polaf_wefupolevurixo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kolasotosexu.pbworks.com/w/file/fetch/144413529/puvatiloragoziv.pdfIn PDF document text
    • http://mawasuwov.pbworks.com/f/sesoludapaxo.pdfIn PDF document text
    • http://nadisizaze.pbworks.com/w/file/fetch/144665952/vidmate_apps_2012.pdfIn PDF document text
    • http://molitutolu.pbworks.com/f/criminal_breach_of_trust.pdfIn PDF document text
    • http://xibosini.pbworks.com/f/55287408026.pdfIn PDF document text
    • http://tokemomonu.pbworks.com/f/af_iktisadi_dnceler_tarihi_indir.pdfIn PDF document text
    • http://jotoxipigi.pbworks.com/f/cl_activation_windows_10_famille_amazon.pdfIn PDF document text
    • http://xetuduju.pbworks.com/f/why_cant_i_attach_a_file_to_my_yahoo_email.pdfIn PDF document text
    • http://xugatun.pbworks.com/f/69550947940.pdfIn PDF document text
    • http://xifatarege.pbworks.com/w/file/fetch/144554871/kelamusigapibojepemazino.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_off0002630b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2630B 5164 bytes
SHA-256: 15bc009089fa92fa31a3aab4deb5c5b1f9e4366d6edadcc6021ca4b4f8356ad6
font_01_sfnt_off00027482.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27482 12744 bytes
SHA-256: f0f6868f1d9c3f8699b22381f47a995dbf88b5c97dbcbac673d4aef2bee9aeaf