Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2111cafc4e4bec8…

MALICIOUS

PDF

76.9 KB Created: 2021-03-19 14:10:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 24431f75cf3c543e65445d65abc300d0 SHA-1: a945a8a6489fabe9fcee1a696ee182a5908519bf SHA-256: d2111cafc4e4bec8e41011f2101c727c513591483d6efca9d89f7e45c8eca6cd
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a primary focus on a link farm hosted on disposable domains, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://xajibur.ru/award?keyword=o+positive+blood+type+diet+recipes+pdf PDF link annotation
    • http://roskycnmx.com/28419024874inhmc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377113/normal_5febcf76294c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382613/normal_602addbb95bec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392193/normal_60331136e8062.pdfIn PDF document text
    • http://universal-kirov.ru/gawakuposobenizokcq0k.pdfIn PDF document text
    • http://iminn.ru/bumasitelofe2d5x6.pdfIn PDF document text
    • http://wagajikis.iblogger.org/ladal.pdfIn PDF document text
    • http://junelizirigoroj.iblogger.org/ls2_bluetooth_helmet_manual.pdfIn PDF document text
    • http://fapseo.ru/vamutebajutuvalupunes4twsy.pdfIn PDF document text
    • http://ppl-nutrshopfit.website/como_aprender_ingles_facil_y_gratis_por_internetio836.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473651/normal_5fe750a5d88d9.pdfIn PDF document text
    • http://xukazuleje.iblogger.org/lakshmi_ashtottara_lyrics_in_kannada.pdfIn PDF document text
    • http://lovelyhouse.online/18013357472c6boc.pdfIn PDF document text
    • http://ouily.xyz/resistance_band_training_workoutsg1lrh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382406/normal_60366963eb6ff.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/potamotaz/28807496504.pdfIn PDF document text
    • https://e85625e8-91d5-48c2-95a4-67b7b95d5b39.filesusr.com/ugd/b97a97_2070072d8c2d433489c0408fc579cef4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lolaritemukole/free_wave_app_android.pdfIn PDF document text
    • https://45f91bdd-2b68-4e60-ae2c-b14373ae5332.filesusr.com/ugd/0d089b_5333d9aad23841349ab884a515a1a217.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jolunenafobuw/85553245197.pdfIn PDF document text
    • http://puwukuju.epizy.com/kasen.pdfIn PDF document text
    • https://s3.amazonaws.com/xufoxorog/tozivezuxe.pdfIn PDF document text
    • https://cad90261-f038-4e8a-b384-2e0e37e6cb8c.filesusr.com/ugd/4c4e45_7335a7ade16e4446b031d1911b9009ae.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_off0000ee98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE98 5268 bytes
SHA-256: 7384196cb84358e9773d809c06a66f75ca966e33ae8d1a5574bddce126eaa542
font_01_sfnt_off00010099.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10099 11044 bytes
SHA-256: 92fa79cf60139709b07f3aa50be57bd11fab97326c1264a54cebcc3c82ec7fbe

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