Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e6a186e3ca88983…

MALICIOUS

PDF

100.1 KB Created: 2021-07-01 00:59:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 9144c90f0538b7fbf110a14c618a0063 SHA-1: e753b773f8ff3a239f5af625d7e657e96115b16e SHA-256: 7e6a186e3ca88983953ca5fbf927d2a9c377b8ffe03782d03dbde015148e69f8
204 Risk Score

Malware Insights

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

This PDF file contains embedded JavaScript and multiple external links, many of which point to compromised WordPress upload directories or disposable hosting. The heuristic 'SE_MFA_LURE' indicates the document likely attempts to harvest credentials or abuse multi-factor authentication. The embedded JavaScript, though not fully analyzed due to obfuscation, is likely responsible for initiating the redirection or exploit. The ClamAV detection further confirms its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9800

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://614move.com/clients/4890/File/64192261645.pdf In PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/b27d8906ee271b81146737ac04f266c8/97564860012.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/58c77f97c2d40f31d7812e03a96f18bd/dekubeveku.pdfIn PDF document text
    • http://alibabashipping.com/userfiles/file/32321604350.pdfIn PDF document text
    • http://stylekd.ru/files/milup.pdfIn PDF document text
    • https://telenovella-bg.com/files/jokalotazesinalok.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/a1994b87e497bc41467fd289d0b43526/sududatapegasaz.pdfIn PDF document text
    • https://atphp.ch/userfiles/file/55298779726.pdfIn PDF document text
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/a7f4672b446ffa6d3c4177929ec71ff8/12502575483.pdfIn PDF document text
    • http://bloomx.com/sites/all/sites/bloomx.com/files/nazetutenexo.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160883946926dc.pdfIn PDF document text
    • https://foxtailmag.net/wp-content/plugins/super-forms/uploads/php/files/cecc54cb3c7415be3ef065ab4cc075a4/zezute.pdfIn PDF document text
    • http://bluefield1966.com/clients/26642/File/91421616610.pdfIn PDF document text
    • https://widepolymers.com/userfiles/file/42094474352.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/glik4u0q01979m5mt0b7o9dlq0/wupifudesegemimozi.pdfIn PDF document text
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/f5300459cecc2df5fed6892f5c944e40/66237657176.pdfIn PDF document text
    • https://sanxuattrucauthangkinh.com/Images_upload/files/xutinaxug.pdfIn PDF document text
    • https://rocksoliddesigns.biz/userfiles/file/luberizu.pdfIn PDF document text
    • http://ttmplus.com/userfiles/files/wifomexorizu.pdfIn PDF document text
    • http://internationalnetworksolutions.net/files/6963104537.pdfIn PDF document text
    • http://ikuma-car.com/js/upload/files/josopu.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8dbc359b21---punabijonemerorodadasexax.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/b39c421ea86a6c4bca7455e94f9c80fb/puzijatekevu.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0d97b6781d---35662200201.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/85c16c26a4a7408f5bb2023caf546465/93107952341.pdfIn PDF document text
    • http://taiwan-casters.com/userfiles/file/78554023582.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=simpsons+tapped+out+next+eventPDF link annotation
    • 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_off0001225f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1225F 18096 bytes
SHA-256: 92f4061d17ce00493fed6555ad4dc6def9bb2ad432332199cde24c2351c1d771
font_01_sfnt_off000151ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x151EF 10752 bytes
SHA-256: 113f7611b484b6e50dbc8cb298987f7f9f31085f86fef91ce900c9833507c0c8
font_02_sfnt_off00016aa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16AA9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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