Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0e829e0c81bc433…

MALICIOUS

PDF

103.9 KB Created: 2021-06-25 20:07:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 6ed00490ab4fc17e6325797898b75c1c SHA-1: 2a04579b5c5814c5f92c1cd73f730617562a091b SHA-256: e0e829e0c81bc433e7556a0e9029c19d9eddc5a54988206e1b765c087a22f8b3
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV detecting it as Pdf.Phishing.Trojan. The numerous external URLs embedded within the document, many hosted on compromised CMS upload directories or disposable hosting, suggest a phishing or malware distribution scheme. The file's structure and content indicate it is intended to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9926

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=lump+on+pubic+area+cancer PDF link annotation
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/be00d98f9c1f2d1f8af802fa40f75608/xumikimoxenux.pdfIn PDF document text
    • http://yesilderecine.com/admin/editor_resim/file/xokarej.pdfIn PDF document text
    • http://loveforlungs.com/clients/a/a9/a9a80f3a93b7553e0860ec1960497db0/File/72149946576.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc9af65f8f1---wagoferininojugovedeg.pdfIn PDF document text
    • http://dfh-consulting.com/userfiles/file/sesugeridopokarap.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/160855daa9b4e1---rotawofabipa.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/cefabe7ec93811714a64384973146481/pajatokimi.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad9cb692abc---poparupirejovaxixutileg.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8b78e4feb0---fatafubinisino.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0d92159c71---26732365218.pdfIn PDF document text
    • http://alituncer.com/userfiles/file/wabexojezobozorovoveto.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/29e1ac90a48fae54113dcec802782bf9/linejokilesiwivus.pdfIn PDF document text
    • http://xoblates.com/clients/e/e0/e08cfb93fb97b00c28394d0532709dc9/File/pepufinajotikaziniz.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160886221d96dd---63419951910.pdfIn PDF document text
    • https://olmitek.by/wp-content/plugins/super-forms/uploads/php/files/nq1f1bf62qhdccl45ph0bk7tf5/9716556248.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b744809ae1---lezikijixotivesumovigulu.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2935eaa158---xidusawiradalevak.pdfIn PDF document text
    • https://studio-september.com/wp-content/plugins/super-forms/uploads/php/files/3a3caef0ca888638d47a810bcbff084c/favoxuxikadusodisiwusef.pdfIn PDF document text
    • http://energo-market.ru/sadm_files/punudinofupuj.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afa0319eec6---20755256242.pdfIn PDF document text
    • http://fernandopelosini.it/userfiles/files/46378332348.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/4519dae705c53c16743d9ce7f60f2195/mozutupafubukolotivalib.pdfIn PDF document text
    • https://asiabiru.com/contents//files/46789602552.pdfIn PDF document text
    • http://bsp-plovdiv.org/ckfinder/userfiles/files/72332140950.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_off0001352a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1352A 10420 bytes
SHA-256: b53200186bfc792c4f1ef25b2fbb46523fff48d102e4c044cd336e0e0b908c01
font_01_sfnt_off00014c74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C74 17136 bytes
SHA-256: 81325e67313bcbfe21b7ef8c05f9e8c1dc0fbe2ba8673da66a04f2dd34c0939c
font_02_sfnt_off0001791a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1791A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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