Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d1fc24f3a9bbd6a…

MALICIOUS

PDF

84.1 KB Created: 2021-05-06 02:57:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: ae318b7b4a97845e33c43d840dbc8cfa SHA-1: a584fdb31e1a1234a4839f3b80fe922e7adf5302 SHA-256: 4d1fc24f3a9bbd6af1ee51aa2b03425bbe24f96cd008a4c1a1f6076e763652e1
146 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a phishing lure, specifically referencing a 'Wall Street Journal subscription renewal price' and embedding external URIs. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing attack, likely aiming to harvest credentials or lead the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://baarspo.ru/wb?keyword=wall%20street%20journal%20subscription%20renewal%20price PDF link annotation
    • http://yachtcharter.group/4004184540ulcl9.pdfIn PDF document text
    • http://jovikizik.iblogger.org/65180542645.pdfIn PDF document text
    • http://mazafaka69pussy.online/relion_test_strips_compatibilityf75ws.pdfIn PDF document text
    • http://zipibafof.iblogger.org/6781467772.pdfIn PDF document text
    • http://ostanni.fun/cm_to_feet_chartuurb8.pdfIn PDF document text
    • http://sabawosekedap.22web.org/90721004209.pdfIn PDF document text
    • http://kersita.space/how_to_crochet_a_beanie_easy_step_by_stepdky3h.pdfIn PDF document text
    • http://sakhavto.ru/vuwunugepokimidukisibofcjfus.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/jezobasit/gotusoguriletawenagiki.pdfIn PDF document text
    • http://dijasogowupa.rf.gd/john_eckhardt_books_amazon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27ff29c2-7f20-4060-8fe9-d6b74453d1fd/kenmore_dishwasher_repair_manuals.pdfIn PDF document text
    • https://0fc0baf9-b884-4fcd-968e-f93c0f938930.filesusr.com/ugd/68ec51_2d87eb1a0c3647a3acf85a3c4c505ecc.pdf?index=trueIn PDF document text
    • http://goraxovub.epizy.com/marine_geophysical_survey.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/943aa4a4-095a-4787-b6f2-52a2e5ca233f/lucent_technologies_partner_18d_phone_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/12906900013.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83e54682-aaec-4a25-b47f-a4b6cd7e0db0/foxinamuwudavave.pdfIn PDF document text
    • https://s3.amazonaws.com/kewuxejikiwe/9628066984.pdfIn PDF document text
    • https://36fde204-cda4-4268-899b-58717f9005d0.filesusr.com/ugd/b13063_74ec2eb268634f88962a82d947f7ea4a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b88dc7c5-0692-4336-ad2e-87418f6797a6/libro_meyer_probabilidad_y_estadistica.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/binaural_beats_for_meditation.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/what_stocks_did_well_in_the_2008_crash.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7d4751b-44b1-4973-a9d9-fcfc4ccfb948/numipovobo.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_off000105da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105DA 5248 bytes
SHA-256: eb856a137b098cf1fdfa44f038c6787b2b059f8d13dc3e09e520b9f1aef07621
font_01_sfnt_off000117d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117D7 12072 bytes
SHA-256: 7b6a6ac23be5c8ea65ed26b5cea1ac1e30001aaca088014ebb5d3b2e51dd9581