Malicious PDF — malware analysis report

Static analysis result for SHA-256 30aeea887a251afc…

MALICIOUS

PDF

86.7 KB Created: 2021-09-22 12:19:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d292c81557528248a8d96421d18623bb SHA-1: 960c9420234ef1c337710e8f6d05edf678e2652a SHA-256: 30aeea887a251afc4a4e3ac4d2ec93edb632095b099eee835c732b7ef77311c4
164 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous embedded URLs are indicative of a malicious document, potentially leveraging embedded JavaScript for redirection or further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://catamma.ru/uplcv?utm_term=loan+club+apk+download PDF link annotation
    • https://grandplaza.bg/uploads/assets/file/85800342436.pdfIn PDF document text
    • http://talani.nl/userfiles/image/file/17138569931.pdfIn PDF document text
    • http://ifaistos.reality.gr/~triantaf/images/file/85967486057.pdfIn PDF document text
    • http://elementsgogreen.com/userfiles/file/70636090950.pdfIn PDF document text
    • http://aimecostruzioni.it/userfiles/files/rewawavejobasawejejutarod.pdfIn PDF document text
    • http://burragebrothers.net/demo/jolie/beta/userfiles/files/62485865078.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/161355ac319bbb---vezojukixitebewobulanibaw.pdfIn PDF document text
    • http://sov.tranovice.org/webpagebuilder/ckfinder/userfiles/files/vuloxuxojidov.pdfIn PDF document text
    • http://www.siposferenc.hu/html/36490305112.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c890dc25c1---80801959476.pdfIn PDF document text
    • http://worshipedia.mobi/sites/default/files/file/samodesozetiturawejiba.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/1612fe3c10ab56---pakofopomimi.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/u2fu99fq3e0i27uoatgpmqtsqb/2571237868.pdfIn PDF document text
    • http://a2hgghk.handylover.com/upload/files/4985680789.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c8b614ab98---gemujamavonope.pdfIn PDF document text
    • http://nhatrangpalace.net/app/webroot/upload/files/matibipa.pdfIn PDF document text
    • https://alkalacarservice.com/public_html/userfiles/file/20824985728.pdfIn PDF document text
    • http://tjsyjdq.com/v15/Upload/file/2021952329584160.pdfIn PDF document text
    • http://sreema.org/FCKeditor/file/lokusajisakazigerugije.pdfIn PDF document text
    • http://babyindex.nl/images/uploads/43280302551.pdfIn PDF document text
    • http://onyx-innovations.com/assets/ckfinder/userfiles/files/sepudogewipasebopelegire.pdfIn PDF document text
    • http://rambud.pl/uploaded/file/nosukagunisubegesoxibina.pdfIn PDF document text
    • http://massimobertoarchitetto.com/userfiles/files/50388704076.pdfIn PDF document text
    • http://www.louisefarmersmith.com/admin/ckeditor/ckfinder/userfiles/files/bufokotij.pdfIn PDF document text
    • http://velo.hu/UserFiles/file/73177221126.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/pategobunalutinomerubusa.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_off0000ecca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECCA 18696 bytes
SHA-256: 42b1504dcf8545b585eeccff57a605c17fa754276c10a7608eceaced68afc9d6
font_01_sfnt_off00011dc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DC8 10292 bytes
SHA-256: 813eb4493f3239929d5cf9fb6239bb0a53ba6b510da8bfc414cc4f6a0a1d50bf
font_02_sfnt_off000134e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134E0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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