Malicious PDF — malware analysis report

Static analysis result for SHA-256 954afae5f029fe13…

MALICIOUS

PDF

75.5 KB Created: 2021-03-13 21:48:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 407bda1196d744dcacc48f68297b0743 SHA-1: 071f9409a3b55550313b4cd05c4d3d1aab132df5 SHA-256: 954afae5f029fe13e7eb3941edda29a8f94a00e6d65504edf11f2ded1cb93526
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded URLs and is flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious and likely phishing-related. The document body, though heavily obfuscated, contains keywords related to a water heater, suggesting a lure. The presence of numerous external URIs and link farm characteristics further indicate malicious intent, likely to redirect users to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://jacksth.ru/wix?keyword=bradford+white+50+gal+water+heater+specs PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4458618/normal_5fe9c4fc44da6.pdfIn PDF document text
    • http://jalojewaga.mypressonline.com/42638042449.pdfIn PDF document text
    • https://cdn.sqhk.co/zapiseniw/ij1jdKV/gaming_chair_pillow_set.pdfIn PDF document text
    • https://cdn.sqhk.co/tasokuxu/MysXif0/24708028797.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374968/normal_602cf7a991f30.pdfIn PDF document text
    • https://cdn.sqhk.co/sipobufiw/qjcBjdG/menemipadeda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461497/normal_5fe8f15212f3a.pdfIn PDF document text
    • http://pifemukopisare.sportsontheweb.net/61838425312.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e55baa64-5df6-4ccf-9da1-33d53824393e/dream_dictionary_snake_bite.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50e94639-3770-4daf-a0fb-24f061415dce/que_es_mas_grande_un_oso_polar_o_grizzly.pdfIn PDF document text
    • http://lugimes.epizy.com/flower_garden_images.pdfIn PDF document text
    • http://xinixolaratabun.rf.gd/mewetalunevugobunagona.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/accc0137-3d97-407f-bda0-30eead7f7052/taruwutavibit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3122f76d-a5a3-4a6b-a531-8659d388cd19/juruselaripejezox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbe35ebf-054e-4c91-82c3-8f7e9ae72833/kavilenamuwi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b239eb3-4757-47cb-b513-2529a6bebcf6/baby_einstein_jumperoo_fold_up.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f45df95-d826-416b-8519-8621866f0095/what_to_get_your_godchild_for_christmas.pdfIn PDF document text
    • http://lupozizitu.epizy.com/the_state_of_anti_plastic_campaign.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_off0000e802.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE802 5824 bytes
SHA-256: f0150bfc754e9d733f588157a11dba2f656e22de7f104e77b2cce863bbe7d009
font_01_sfnt_off0000fbeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBEB 10776 bytes
SHA-256: f4cf9d173bd10062d6cfa0adc1131cc686f8c8abb36ea34364d11d8b6176830a

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