Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e1fb5fe8071a7d4…

MALICIOUS

PDF

82.3 KB Created: 2021-09-08 01:42:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 82c3dddff675f59cf049db0595552421 SHA-1: 294b3c66681f2b1c5a4c3fbd6af0fac97f55cbca SHA-256: 4e1fb5fe8071a7d450f6659558ee51e16e06ae0357dbba4dbea8b51a93d7eb75
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links to external websites, many hosted on compromised WordPress installations or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://allytemp.ru/uplcv?utm_term=jerr+dan+parts+manual PDF link annotation
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/8d396d5abf9d3d65f4757f1124231b02/runujosavemise.pdfIn PDF document text
    • https://congchunghadong.com/uploads/files/zusixomuxofipevuwemu.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/su47ak9jm1gbgu8fupgg7pd992/73936411687.pdfIn PDF document text
    • http://feg.vn/uploads/files/79141737714.pdfIn PDF document text
    • http://legendtec-eg.com/wp-content/plugins/super-forms/uploads/php/files/kvfs309tu9d40e5fjsevsumrm2/24553470816.pdfIn PDF document text
    • https://pasarantogel2.com/contents/files/58880016213.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc22a24e249---98696268807.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cdc43bcf4c---kokunapelidemozij.pdfIn PDF document text
    • https://etcbt.com/userfiles/file/fekalido.pdfIn PDF document text
    • https://cooperspick.com/files/xejakowilepekivuzowajed.pdfIn PDF document text
    • http://dui-antidote.net/images/userfiles/file/63856507997.pdfIn PDF document text
    • https://dwitunggaljaya.com/sitefiles/file/xegozonokavaxatew.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16072d7b1615ec---zelupexedukerewaw.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/7tjj4sb3ajv2lfj6ttor6joq0d/pawavodusa.pdfIn PDF document text
    • http://innospectrum.eu/hirlevel/file/nikejip.pdfIn PDF document text
    • http://erex.hu/upload/file/vuzamobupiresaga.pdfIn PDF document text
    • http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc6ec9030b---fitovorogifudi.pdfIn PDF document text
    • http://fskyok.com/uploadfile/files/wiviruzojolozub.pdfIn PDF document text
    • http://zhengfutz.com/v15/Upload/file/2021717437562824.pdfIn PDF document text
    • http://kzlo.pl/fotki/fotki/file/bulonametubamajidivu.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b43dbf48b46---19899615235.pdfIn PDF document text
    • https://zebcom.in/userfiles/file/davajojevo.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/je8f4vvecp5gjo83e4h063pcm8/99296132411.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/fm84pvf4dei3negca3262tontc/23537238933.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE26 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f63d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF63D 10432 bytes
SHA-256: a2f0b913356ac7e5bf900e6a318210eee2df5e87f778c40a4c8ea817213ddc7e
font_02_sfnt_off00010ddd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DDD 17604 bytes
SHA-256: 08838912f53ee6dc14f78b923b998a07a07f44103fca010c0ac69624174793ec

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