Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e896a284397ba9b…

MALICIOUS

PDF

74.9 KB Created: 2021-03-24 19:27:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: c76a72cc70f3a5ece92082591a493422 SHA-1: 4bc61b3ac448af21521e6192e730c18c1824ebda SHA-256: 0e896a284397ba9b30383475c62e8a1f75b8e6f3dfd95104de93306d3ab9fc75
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The document body, though partially corrupted, contains text related to 'cashing a fake check' and includes numerous external URIs, many of which point to disposable hosting and redirectors. This strongly suggests a phishing lure designed to lead users to malicious websites.

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/strik?utm_term=can+you+cash+a+fake+check PDF link annotation
    • http://xuritepizib.mygamesonline.org/minority_rights_in_pakistan.pdfIn PDF document text
    • http://rivilidopu.medianewsonline.com/community_center_case_study.pdfIn PDF document text
    • http://crubr.space/4728903099400idn.pdfIn PDF document text
    • http://devivitonewe.sportsontheweb.net/22663304073.pdfIn PDF document text
    • http://mxbur.fun/123065220505p7a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491926/normal_6029669180c5d.pdfIn PDF document text
    • http://limons.space/iyonlama_enerjisi_grafik_sorularjvvk2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426090/normal_603db5bd6bd21.pdfIn PDF document text
    • http://faponabon.mygamesonline.org/catecismo_catolico_de_los_estados_unidos.pdfIn PDF document text
    • http://mawosatejojeka.sportsontheweb.net/putavu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417530/normal_602b8a0418d2b.pdfIn PDF document text
    • http://copyrightsupport-ig.com/gopuwutorobexejujoq589o.pdfIn PDF document text
    • http://fbcopyright-center.com/netgear_wnr2000v3_review1bkgi.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/9a73dbc8-e52a-4ac2-a26c-6c2aa0d43400/javovopujowiri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1dcf06af-88d7-4683-846f-1b443e35fd66/the_crown_episode_season_1_episode_1_cast.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7db0092f-7bd7-4ee4-91b7-e21c9cf4fe3f/what_meter_is_annabel_lee_written_in.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60fa7dbd-c6ad-4bbe-aec9-b30a6f699666/zijunupifo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0aaa454b-d573-4a21-a674-4f7b076b159c/how_to_find_out_extension_number_on_nortel_phone.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_off0000e724.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE724 4912 bytes
SHA-256: 448c2ee55865e915fca4868c1d72553efafbfef4c61ca8f5afce3499d73093f7
font_01_sfnt_off0000f7e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E7 11056 bytes
SHA-256: dcf30f0621828af83d56362facfe87568b3fdb1e96257a1395d75adef65022bf

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