Malicious PDF — malware analysis report

Static analysis result for SHA-256 d714baf74b48348d…

MALICIOUS

PDF

78.0 KB Created: 2021-02-18 15:40:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 9e691c11a7a9faf7493f5e44a06ed067 SHA-1: dd7037397caa4fc399c712fc779496f7657e94b3 SHA-256: d714baf74b48348db2747067a333b60ac2c0ea4497fb86a936ba74eb9295825d
214 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for linking to known malicious redirector infrastructure. The document body, though heavily obfuscated, suggests a lure related to a lease agreement, likely to trick users into clicking embedded links. The numerous external links, many pointing to PDF files on various domains, indicate a link farm designed to distribute malicious content or engage in phishing. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/123?utm_term=california+association+of+realtors+lease+agreement+2018+pdf In PDF document text
    • https://tagakokiginozol.weebly.com/uploads/1/3/0/7/130775172/6125da5b40d.pdfIn PDF document text
    • http://pipazodonuwadu.iblogger.org/gateway_b2_workbook_answers.pdfIn PDF document text
    • http://midokasek.iblogger.org/raja_babu_film_song_bhojpuri.pdfIn PDF document text
    • http://arboozfilm.com/wubogavegazufe152dh.pdfIn PDF document text
    • https://zukigepuzena.weebly.com/uploads/1/3/4/5/134593101/6691302.pdfIn PDF document text
    • http://milansit.space/19437635733a7v94.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/mejados/bcbs_federal_prior_authorization_form_for_linzess.pdfIn PDF document text
    • http://xasigidokax.rf.gd/icloud_bypass_tool_iphone_5.pdfIn PDF document text
    • http://telewazikenap.rf.gd/61471512180.pdfIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/73581060341.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/12429866113.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/dilkes_primary_school_ofsted_report.pdfIn PDF document text
    • https://s3.amazonaws.com/tomaxade/analyse_this_pro_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/yamaha_cd-_s300_cd_player_manual.pdfIn PDF document text
    • http://nevurewajarip.epizy.com/kejuxoduralomanetubazubed.pdfIn PDF document text
    • https://s3.amazonaws.com/bomifabipi/56630608981.pdfIn PDF document text
    • https://s3.amazonaws.com/tapelu/22546159753.pdfIn PDF document text
    • https://s3.amazonaws.com/zowibatev/james_bond_theme_piano_sheet_music_easy.pdfIn PDF document text
    • http://kaxogesidod.epizy.com/android_auto_wireless.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_off0000eecf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEECF 5900 bytes
SHA-256: a3e718e07371c41d3ef12d19aaa71450b0da42a2657d0b094583efb23ec01150
font_01_sfnt_off000102d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D3 11656 bytes
SHA-256: 012695b05444970630a9e1fea95532089b6e0fcf2790cae9a4bd03e7b3a53d44

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