Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9917ab3b30cb741…

MALICIOUS

PDF

87.1 KB Created: 2021-09-17 23:31:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 0f8719e66d055accdbc1a7ca10873569 SHA-1: 0a0a31595a2b7b54eebc6b4c4e0752da1205bf33 SHA-256: d9917ab3b30cb74147f0d9d2922882e65e175d38a4ac5bfdf3e1a510690716dd
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to websites hosted on compromised CMS platforms or using disposable domains, indicative of a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely involving exploitation or redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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 http://myshalewell.com/userfiles/file/46578392359.pdf In PDF document text
    • https://albawadiroad.com/userfiles/files/41978294148.pdfIn PDF document text
    • http://proclima-membranes.ru/userfiles/file/45037149327.pdfIn PDF document text
    • http://www.themixchange.com/userfiles/files/59510621464.pdfIn PDF document text
    • http://energo-winstal.pl/userfiles/file/sezezufamuwegoda.pdfIn PDF document text
    • https://mtydizayn.com/userfiles/file/liwema.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/858ba697caf23accac6771fbadf2fa25/91224449565.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/161425f443d811---38147744094.pdfIn PDF document text
    • https://angkorphotographyguide.com/userfiles/file/78642923787.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/161355ac68d519---miforebazasujosu.pdfIn PDF document text
    • http://idevicesplus.nl/app/webroot/files/userfiles/files/zabafuzatobokutar.pdfIn PDF document text
    • http://suphammamnon.org/uploads/files/sufigumipaxivabusepa.pdfIn PDF document text
    • http://solarissoft.com/img/userfiles/files/43232132953.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b7d637d3b6---fisegirarodekaxofo.pdfIn PDF document text
    • http://agedwedfjtj.pretty-match.com/upload/files/58774435161.pdfIn PDF document text
    • http://muzycznescyzoryki.pl/userfiles/file/girulebizogoxinitom.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/80921cb3898ffe83e8ba84855a16bf3e/duvajomagivegisiralok.pdfIn PDF document text
    • http://kuresi-kaitori.com/upload/content_pic/files/binunijezuredavadexixe.pdfIn PDF document text
    • http://123dvere.sk/files/file/dedixifowewetiliwotetewi.pdfIn PDF document text
    • http://restokrat.info/userfiles/file/57945910893.pdfIn PDF document text
    • http://metabolit-plus.ru/files/file/42082914969.pdfIn PDF document text
    • http://mazdooradda.com/userfiles/file/tojugavuxirirajamop.pdfIn PDF document text
    • http://eachfun.com/ckfinder/userfiles/site_eachfun_com/files/97569866072.pdfIn PDF document text
    • http://quranday.org/userfiles/file/79953598444.pdfIn PDF document text
    • http://foto-recepty.sk/images/fotky/50798574356.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/8004909b56e01525b0253b13f3b930fa/32710514494.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=good+witch+halloween+special+2015+watch+onlinePDF 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_off0000ee2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2E 11064 bytes
SHA-256: b0ef8a22332675d6e5a134305b47dedcdeb82fe659c620419a8483d3f0aad4eb
font_01_sfnt_off00010819.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10819 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001202b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1202B 17980 bytes
SHA-256: 9b0f005e8ef7907cf9e5d909f36c0f932b14d131d75400573ad078a44009df24