Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d753064620cf611…

MALICIOUS

PDF

62.7 KB Created: 2021-09-18 00:27:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 3a5875a49740a592b6470a177d27197d SHA-1: 1f02be1ef491cce87e79eb9fb94be4ecc3a365d7 SHA-256: 8d753064620cf61119ed1baf7df1adc2333469a729ef87e7b6be221fdeadf103
154 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and ML classifiers, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to compromised CMS upload directories, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure align with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5019

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 https://crewmak.ru/uplcv?utm_term=diary+of+a+minecraft+zombie+read+online+free PDF link annotation
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161303319dcfb2---jopodidajasup.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/do523vgge1iamq68k93mg9mam2/48009709711.pdfIn PDF document text
    • http://pttaccounting.com/userfiles/files/dadosilozi.pdfIn PDF document text
    • http://el-system.jp/uploads/2012/files/zimoxoj.pdfIn PDF document text
    • http://przystaneknida.pl/data/aktualnosci_imgs/file/gikinupotepupelokisogu.pdfIn PDF document text
    • http://raffaelecavazzoni.com/userfiles/files/71928844664.pdfIn PDF document text
    • https://prolocolidodisavio.org/ckfinder/userfiles/files/komikoxuxerisivozamobu.pdfIn PDF document text
    • http://goldmustang.com/files/files/nedufepimegeranatenopapod.pdfIn PDF document text
    • http://praconsulgroup.ru/pict/file/tedalokovogubafajimisu.pdfIn PDF document text
    • http://kleinschaden-expert.com/userfiles/file/61605780098.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/48638960306de341b1df020055a1ec81/42810942061.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/c01e0038662268b756684dfea394d824/59229654169.pdfIn PDF document text
    • https://luatsuavina.com/userfiles/file/11867057657.pdfIn PDF document text
    • http://scherzerpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vavalugaduzafewuwokiweki.pdfIn PDF document text
    • http://gfk-schwimmbad.de/i/File/tijobironolo.pdfIn PDF document text
    • https://soudureornementalelauziere.com/upload/editor/file/xopivupuguvo.pdfIn PDF document text
    • http://bezpiecznamlodosc.org/files/file/volanuradukosawosi.pdfIn PDF document text
    • http://carrozzeriardue.it/userfiles/files/51816123210.pdfIn PDF document text
    • https://invest.pl/userfiles/file/17873244203.pdfIn PDF document text
    • http://skia22.ru/pic/file/41116540077.pdfIn PDF document text
    • http://phunggia.biz/userfiles/file/tusewodorijotivus.pdfIn PDF document text
    • http://www.octopus-quatuorvocal.com/ckfinder/userfiles/files/90098002264.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1613a78a6bf2be---41535498616.pdfIn PDF document text
    • http://ruihuitax.com/files/file/naxonijirulop.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/5371804b934272681ca6f775a9b62101/pikubepitakevokaziril.pdfIn PDF document text
    • http://barahi.com/assets/userfiles/files/suwodurogu.pdfIn PDF document text
    • https://rwd1.thadv.com/upload/files/xarifoluvexofizimigu.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2D2 17380 bytes
SHA-256: 0027d19aede2e713c6565b0d7b43201c1a158eac10eaa200849b472e25389b59

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