Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b96dfa4e3bdf8ef…

MALICIOUS

PDF

87.2 KB Created: 2021-07-22 00:41:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 1d9cddf29d0329b9a291715b3e5a87ff SHA-1: 306026a4d710e0d80ee0ee3a6290ceb9860d38cf SHA-256: 1b96dfa4e3bdf8ef618cf35ae18097e05a05e4683dced4cd8cc4618b61598aac
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised websites, likely to lure users into phishing scams or download further malware. The presence of multiple links on disposable hosting and compromised CMS uploads reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4202345f8---lisakodab.pdf In PDF document text
    • https://colakcivi.com/userfiles/file/46369366322.pdfIn PDF document text
    • http://taxicityplus.ru/userfiles/file/31743085859.pdfIn PDF document text
    • http://classicalgardenornaments.com/uplds/file/23358884989.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/646ba345079c740bec42fa0e229ccf13/15429142142.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095ba6a16fce---gokipe.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/11a6f78614281ee1bf34c67d42de2112/tosofitumezesugog.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/20603b8f5178432408b21964b0619b68/96225391588.pdfIn PDF document text
    • http://epmachine.ru/d/files/zuwotubugiti.pdfIn PDF document text
    • http://cosyromania.com/media/file/lafiridekovalekofeg.pdfIn PDF document text
    • http://creaorganization.com/depo/sayfaresim/file/9424270820.pdfIn PDF document text
    • https://immo-cjeanpaul.lu/userfiles/files/11509812653.pdfIn PDF document text
    • http://pytextiles.com/userfiles/file/136047219.pdfIn PDF document text
    • https://actor-conseil.com/files/file/mekopojap.pdfIn PDF document text
    • http://geombiagioschettino.eu/userfiles/files/44651915290.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606dc2e535ec3---jikajibijusasusit.pdfIn PDF document text
    • https://edu-mate.kr/_UploadFile/Images/file/69901595272.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b5c14babcee---42452849972.pdfIn PDF document text
    • https://rybczewice.pl/userfiles/file/mamopifudelubipu.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/bca6b03558ad7d365949457d96055c3b/7295159551.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/10555057351.pdfIn PDF document text
    • https://www.stjohnhomelessshelter.org/wp-content/plugins/super-forms/uploads/php/files/32c3bab0cc9c2dee3762ad7bb69c2c8a/81763106351.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=compliance+audit+report+templatePDF 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_off0000f34a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF34A 10640 bytes
SHA-256: 66b7712b71d46ca3b9dad3cea59dd22c42367795170d2525c6dfb60ee158ed34
font_01_sfnt_off00010b91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B91 16680 bytes
SHA-256: ef29a5e3539ca87798d58a2cbead15e18eeb4e18ea61d95178fa8a50c49874e4
font_02_sfnt_off000136ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136AC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.