Malicious PDF — malware analysis report

Static analysis result for SHA-256 0eea359a5cbbd597…

MALICIOUS

PDF

88.2 KB Created: 2021-03-24 15:04:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 2b82d4d9bb673197fd8970f239167347 SHA-1: 2d1cca741173e10694a3004dbb8a615212000953 SHA-256: 0eea359a5cbbd597f1084e85b19498b82f186bd9e53398b5e665d5cb0b8a3b53
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://midufefew.ru/strik?utm_term=simulation+and+simulacra PDF link annotation
    • http://hermidkovo.info/godudidovez3vfmr.pdfIn PDF document text
    • http://milky-rp.space/dibujos_de_superheroes_a_lapiz98cpy.pdfIn PDF document text
    • http://helplnstagramoffice.com/66327685757rx6ar.pdfIn PDF document text
    • http://tozidak.mygamesonline.org/33717099549.pdfIn PDF document text
    • http://generatorsale.ru/los_juegos_del_hambre_en_llamas_completa_en_espaol_gratis9f7hy.pdfIn PDF document text
    • http://pet-guru.shop/the_practice_of_adaptive_leadershipu0ywx.pdfIn PDF document text
    • http://giocodigital.website/fisijosebaxurusofonijikixue095.pdfIn PDF document text
    • http://wemuwetafivaxe.sportsontheweb.net/rafadozekijegipur.pdfIn PDF document text
    • http://im-marceting.site/turtle_beach_px51_ps4eko74.pdfIn PDF document text
    • http://nadefememidep.medianewsonline.com/jogolagos.pdfIn PDF document text
    • http://gebuhrenfrei-mein.com/how_to_make_magnetic_field_sensor26kc5.pdfIn PDF document text
    • http://bellissimo.online/54755052906xxl64.pdfIn PDF document text
    • http://pirojibanenuzi.getenjoyment.net/brihaspati_dev_katha.pdfIn PDF document text
    • http://lofitner.buzz/13441435979fawv0.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
    • https://uploads.strikinglycdn.com/files/36a7c199-1531-4787-8f1e-1ba1277c746f/ccna_cisco_certified_network_associate_study_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/092fa182-b45d-4d03-8ee7-dc105e7859f9/34165915045.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f336e4b-d64f-4ce1-a7ba-4d3d82ba8292/how_to_release_shoulder_neck_tension.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a674f0da-e949-48ff-8bbb-c6609c1b26a7/signs_a_guy_is_interested_in_you_body_language.pdfIn PDF document text
    • https://57e596f1-a2cf-4e3c-9ba9-dc8e42e7d639.filesusr.com/ugd/1e1da7_f50785ae63464dc4b3448109350ac67a.pdf?index=trueIn PDF document text
    • http://wulibazosuxib.onlinewebshop.net/denakolusinuluwuxa.pdfIn PDF document text
    • https://e5b7f393-9b83-42c5-a877-5b85c0c772c8.filesusr.com/ugd/77b42d_76710f16eea046d0a374f785a1cfdb06.pdf?index=trueIn PDF document text
    • https://45ed8376-e832-497f-ab20-0a31924dc5db.filesusr.com/ugd/4b7290_ee6cec7eca53444bb557a89eca935148.pdf?index=trueIn PDF document text
    • https://297de083-771a-4730-a3b8-a2afe8c7d209.filesusr.com/ugd/47424f_435aca36271c441b879b6dc2835733e2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/174564ec-e780-4f1b-b17f-403f86fbaa00/batch_programming_free_download.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_off00010de8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DE8 4952 bytes
SHA-256: ad21d3b63ec484cc143ef6499cb87e061585582060ce90c3ef3bad344a3f6590
font_01_sfnt_off00011e89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E89 10920 bytes
SHA-256: 41227ff1fe86f852d22c5a6a276d2399396676856ca6d71a49763fcee240da8a
font_02_sfnt_off0001439f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1439F 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e