Malicious PDF — malware analysis report

Static analysis result for SHA-256 618298d8dea0dc78…

MALICIOUS

PDF

78.8 KB Created: 2021-06-10 14:07:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 110284e07755277f67a04460f490ed71 SHA-1: 8303380ea92d7290ec6c2663f2659282b4a8d510 SHA-256: 618298d8dea0dc785a1d56aa2df6d55c4b270c40009b1676c136a34d81c435c5
176 Risk Score

Malware Insights

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

This PDF document contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a phishing or malware distribution attempt. The document body, though partially obfuscated, suggests a lure related to "Malcolm x viewing guide vocabulary and questions answers" to entice users to click on these malicious links. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://drafthe.ru/uplcv?utm_term=malcolm+x+viewing+guide+vocabulary+and+questions+answers PDF link annotation
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160882f50500b4---sibixerijuperejerasepu.pdfIn PDF document text
    • https://daismene.it/file/22988820619.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/lk78ctihg4kkjmagedj3eaf97k/79046716955.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/tsnc19mdatcnr9s8ed52ut4701/49991427573.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160771c114b178---xokaviladelagukog.pdfIn PDF document text
    • https://bandai-k.com/userfiles/file/pitegejumuweliw.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160926625d0c49---pinid.pdfPDF link annotation
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607c6ab64c8c3---84506167651.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/66dddd1a54aed352c7f3eccd4a5ba28d/18361136861.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/4sjs48fuml40rn4koiffil25m5/85097626681.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/158tqj1fv90cvdujkk1vqr3c2d/66286870068.pdfIn PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd3e85a4b5---94179801386.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160adb0c71f5e2---29239672002.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607849737b576---seforojisadigatabiborapep.pdfIn PDF document text
    • http://aaaexpressac.com/userfiles/file/fivimolorowoge.pdfIn PDF document text
    • http://bjsprt.com/uploadfile/file/%5C/2021052505455959.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/5582201321.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607d987149942---bejogokazimeka.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/869ce53a896df943bd1f9c68be08f2bb/tadivowif.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000f48e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF48E 5852 bytes
SHA-256: a5e1733a3c09b153b944aa46870f5e7a05e19ed792105313f3d72ed3f6cd5730
font_01_sfnt_off00010880.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10880 10912 bytes
SHA-256: 6c97e4e9b3988e6249c86dbed1a3a985b71eee8ced6fa868cdbed49ae527e8d9