Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7cbbb553402cdf9…

MALICIOUS

PDF

61.7 KB Created: 2021-02-17 03:11:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 59861944a0fb8851a94f0379d8893ffe SHA-1: d332cbde128ea0d08ad377fd4fb7c3fe244e7c5a SHA-256: d7cbbb553402cdf94fb19e631be30e8938e43bb6815cf48a6c780802786816ce
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains a large number of external links pointing to disposable domains, a common tactic for SEO manipulation or distributing further malware. While no scripts were directly extracted, the PDF structure and extensive external linking suggest it's designed to lure users to malicious sites, potentially exploiting vulnerabilities or delivering phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/123?utm_term=the+time+traveler%2527s+wife+story+summary PDF link annotation
    • http://fixmarker.fun/51947545408lnf9b.pdfIn PDF document text
    • https://pebizenif.weebly.com/uploads/1/3/0/8/130874023/5719533.pdfIn PDF document text
    • http://gidpopiteru.com/plantilla_para_escribir_cuentos_primaria0vzu9.pdfIn PDF document text
    • http://myfirstsite.xyz/autodesk_3ds_max_2014_keygenhml32.pdfIn PDF document text
    • https://badosesidexezub.weebly.com/uploads/1/3/0/8/130874160/xudajafet.pdfIn PDF document text
    • http://sutixekume.22web.org/grammar_worksheets_2nd_grade.pdfIn PDF document text
    • http://probkin34.xyz/transformers_autobot_stronghold_2_hackedrou47.pdfIn PDF document text
    • https://savozajit.weebly.com/uploads/1/3/5/3/135320594/waxewoga.pdfIn PDF document text
    • https://vofitikasu.weebly.com/uploads/1/3/1/8/131871658/4867025.pdfIn PDF document text
    • http://flowerport.market/fuminepajixesolisb6hlp.pdfIn PDF document text
    • https://rujusuxiledajo.weebly.com/uploads/1/3/4/8/134861970/5387796.pdfIn PDF document text
    • http://dom-bita.org/31569086903ozujw.pdfIn PDF document text
    • http://goodik.fun/dutipokib61sdm.pdfIn PDF document text
    • https://jefaganogebe.weebly.com/uploads/1/3/1/4/131437435/vegari_visowotemanuf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gopudagob.epizy.com/44687576083.pdfIn PDF document text
    • http://jilerixam.epizy.com/template_cv_word_gratis_bahasa_indonesia.pdfIn PDF document text
    • http://jomobagezib.rf.gd/26740518000.pdfIn PDF document text
    • http://lokimutopilar.epizy.com/76399912512.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_off0000b8de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8DE 5244 bytes
SHA-256: 0afd746efadcbffa8d3414bb67f16f34b9392d0a252b79cd1596bc8a0d58de1f
font_01_sfnt_off0000caa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAA4 9028 bytes
SHA-256: e99ee9ce23943dabba3d456e9935491a9ed1cdac04dff016f9ec2053ba99653f

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