Malicious PDF — malware analysis report

Static analysis result for SHA-256 514c6f87515b0dc2…

MALICIOUS

PDF

84.3 KB Created: 2021-07-03 00:04:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 7fb35a40e1caa79ee3654ebcfe50a90c SHA-1: 156d24ca783a38787bfbe2bede234b63f3ae8d98 SHA-256: 514c6f87515b0dc295c86736eebeb03d4a39987a1c44177556a621d344e4ae1d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting it functions as a link farm for phishing or malware distribution. The presence of embedded URLs and the overall structure point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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
  • 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://garglob.ru/uplcv?utm_term=formula+of+lateral+surface+area+of+cone PDF link annotation
    • http://skolicka.eu/foto/images/file/nulitumuxowalirisav.pdfIn PDF document text
    • http://jyotiacademicpress.org/uploads/file/zifefexuzibawizosewom.pdfIn PDF document text
    • https://aucordechasse.fr/vosImages/bogefoze.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/3peclde5g4gc6r5f0dgsan0lr0/72878526193.pdfIn PDF document text
    • http://indel.sk/userfiles/file/vazatuxapepiraxoleribosi.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/q4gajbtic3gi2351vhl160724j/43842064624.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/16083399688441---rojiwugigorekuwusalo.pdfIn PDF document text
    • http://aliglobshop.com/userfiles/file/75787753778.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/b0a50605c4238882df0eb922acf7d2fb/64805799826.pdfIn PDF document text
    • http://kennycojewelry.com/userfiles/files/202106/1623766077.pdfIn PDF document text
    • https://101doctor.com/uploads/ckfiles/files/60d20a03c2288.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1609449c19514a---tanemidugekasexigud.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/ae45kdkqq82iapo87oomd1sqps/85762168926.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b009659b8b5---jizavapugudanogiboxunu.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/t1knth313v43p4o214thdl4poh/29886959590.pdfIn PDF document text
    • http://101-games.ru/images/uploads/files/jexinurububisuru.pdfIn PDF document text
    • https://uppersanduskyrotary.com/cms/files/File/73862382782.pdfIn PDF document text
    • http://wallsfamilyreunion.com/clients/876683/File/49087273968.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3a8a61c178---voxifajuroneno.pdfIn PDF document text
    • https://sinhadventure.com/uploads/file/49906298138.pdfIn PDF document text
    • http://highlandhighclassof1962.com/clients/c/c3/c330a44b04b080977bf299ea430a317d/File/lupureratesuxe.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/bovdp54u6b7q5llojasclgb8ta/posazonipugimuw.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000e393.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xE393 18252 bytes
SHA-256: ff5239512ddfebdfe7ed5ec1fa73e7f217824afc25ec1f923ca45cebcc92ca46
font_01_sfnt_off000113cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012be4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BE4 10480 bytes
SHA-256: 8beff28029faebca46696d37bafce190f81d90f4c918f56f7a770190c4cb547d

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