Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cbc03f255b78e58…

MALICIOUS

PDF

77.6 KB Created: 2021-09-17 08:53:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 8564918123be0ec0074fe81e06c2c588 SHA-1: c964009c78a1fef12ce9254206895df43a836ff6 SHA-256: 1cbc03f255b78e58ba040d8e97d7064a197a2f340986584d1cb3bbce8b70e524
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users to potentially malicious content. The presence of these links suggests an attempt to lure victims to external sites for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7561

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/4db773282c540f9977adf67418c78d70/64620350667.pdf In PDF document text
    • http://zelene-centrum.cz/webpagebuilder/ckfinder/userfiles/files/pifefelerusuromefaluka.pdfIn PDF document text
    • http://dworbieland.pl/userfiles/file/37680644352.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16132bb792c667---gemevegawulojipimesiniwux.pdfIn PDF document text
    • http://cy2hand.com/userfiles/48006090357.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614238b10f1b6---11325322714.pdfIn PDF document text
    • http://hakasasi.id/userfiles/file/zuvukijiguvoluna.pdfIn PDF document text
    • https://hrmconsulting.biz/upload/files/danibujusokerenopo.pdfIn PDF document text
    • http://www.icf-plant.com/files/file/58547163361.pdfIn PDF document text
    • http://soeurs-scjboran.fr/soeurs/upload/files/5602041911.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613f6368ca185---xofituwuzejabukeziranu.pdfIn PDF document text
    • https://presstone.hu/userfiles/file/39194431793.pdfIn PDF document text
    • http://styrexon.cz/userfiles/file/84027068603.pdfIn PDF document text
    • http://nomayaku.com/userfiles/file/43098455462.pdfIn PDF document text
    • https://weldingportal.it/userfiles/file/91726115799.pdfIn PDF document text
    • https://ekinyalitim.com/depo/sayfaresim/file/samiridovufopatujizomu.pdfIn PDF document text
    • http://multi-accueil.fr/ressource/site-image/files/gorigolibeze.pdfIn PDF document text
    • http://3t-t.com/User_File/UpFile/file/20210901071616_MTA0ODM5MDk4OTM=.pdfIn PDF document text
    • http://futsalcb.cz/picture/vtextu/file/kepewewitaxarobelekevam.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/161376ddd45aac---82066588456.pdfIn PDF document text
    • http://luijkzonwering.nl/image/file/derupimefuwi.pdfIn PDF document text
    • http://calisnt.com/uploads/files/zivupogasikudofuko.pdfIn PDF document text
    • http://ned.ru/uploads/files/jatelawiserop.pdfIn PDF document text
    • https://sainaudit.mn/File/44263943820.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=world+most+gb+gamePDF 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_off0000e18c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE18C 17832 bytes
SHA-256: ddeb1fd2e700abca489eff60e7de005c68a520741d9083ee9d3eee76e2592c3f
font_01_sfnt_off00011031.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11031 10528 bytes
SHA-256: 1b8034780c9d92ce8a384b62eeb68c247045209d19d0c99e62658e4bd2158e73

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