Malicious PDF — malware analysis report

Static analysis result for SHA-256 a427366effd8cb89…

MALICIOUS

PDF

62.5 KB Created: 2021-09-06 07:36:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: babc1645fbf17314006d20a84b012e54 SHA-1: 1e1d243768f56f9f9f64515785afb82c79887656 SHA-256: a427366effd8cb895693b4c2e97c30f4824c1198448a4c35ead122097b98231e
154 Risk Score

Malware Insights

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

The PDF contains a large number of links pointing to various domains, many of which appear to be hosted on compromised CMS upload storage or disposable hosting. This structure strongly suggests a link farm designed to distribute phishing content or malware. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7065

Heuristics 5

  • 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
  • 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://autoscuolecasetta.it/userfiles/files/jojowudeb.pdf In PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/5dd93ac348fdf5b0f43d7bc6dc903b11/zalik.pdfIn PDF document text
    • https://aljuboori.com/userfiles/files/zimetexegapavupudatakugem.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a6d093a293---tupiguwo.pdfIn PDF document text
    • http://xyr59.com/filespath/files/20210903152138.pdfIn PDF document text
    • https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/ejth8dt2q20mh5vikf7gdl7oal/85607130714.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/3df0d6a3be6e991692dcac6a0afb00ce/gowetolusodowevimu.pdfIn PDF document text
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/osjik5dhgdombu9pusrlj9ef3p/pasime.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078da6e21ed9---xaribixojagas.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b448dd4668b---52463753758.pdfIn PDF document text
    • http://maility.pl/_ADRESuserfiles/file/23039205131.pdfIn PDF document text
    • http://menloathertonhigh1980.com/clients/6/6f/6f83464fe0b13873896cace574d4baa5/File/degigutuwekunosezup.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/16075744aefdfa---zabotalofijutovoraved.pdfIn PDF document text
    • http://rbc-bezorgdiensten.nl/upload/wetixolizub.pdfIn PDF document text
    • http://china-baby-clothes.com/d/files/31027431367.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/523101bad656c74e086583d5a453ac2e/zenakebujito.pdfIn PDF document text
    • https://zohopinler.com/calisma2/files/uploads/kesajelegotavez.pdfIn PDF document text
    • https://bosgo.mn/uploads/files/87636062879.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a02cd002a22---javalemenerin.pdfIn PDF document text
    • https://communeouchamps.fr/userfiles/file/loram.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606cef84c75cb---vafaf.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160786a5e77d48---gevefedudozazigiruz.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/593a7950da7af1a5b9fa6591f85dcff0/korotaze.pdfIn PDF document text
    • http://doudou.tw/userfiles/files/90209868223.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=modul+statistik+dasar+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ba82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA82 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d294.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD294 17380 bytes
SHA-256: d04bf5255a4f40773ba6dc18adfa6a7757129011756186f0b5dc3e40adb02661