Malicious PDF — malware analysis report

Static analysis result for SHA-256 91cbca40d77b6f07…

MALICIOUS

PDF

82.9 KB Created: 2021-07-03 19:30:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: bcbcb34698d96046af8a64ac685d25a6 SHA-1: 394b2f1c7bbe105e544db8bb9969dbe613e35134 SHA-256: 91cbca40d77b6f07d4a5a8c59381ab38e49fc49d822270955bc9d2e2b1a0ee7a
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to potentially compromised websites or disposable domains. These links are likely intended to lure users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://bungefamily.com/clients/5233/File/gisititozuzebibodori.pdf In PDF document text
    • http://chuaphucluong.com/uploads/image/files/vesidovixazirejinafene.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/sg6mss471spud8mbjhfg8up246/23511246017.pdfIn PDF document text
    • http://ahlhy.com/uploads/file/011553567689.pdfIn PDF document text
    • https://demircanticaret.com/userfiles/file/522397166.pdfIn PDF document text
    • https://wegofa.com/userfiles/file/migese.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/160979e2c522bf---suzajakuziduleneni.pdfIn PDF document text
    • http://bbpcosmetics.com/admin/upFiles/2021-5/file/3283735110.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c168a155ef7---44710294487.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7fa70ea971---besomolegoxemirojon.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/d9804c121b41a9fe94f73cf471ff60b7/fumuvesisus.pdfIn PDF document text
    • https://clinic4lab.com/upload/ckfinder_temp/files/20210623164347.pdfIn PDF document text
    • http://arcenevents.nl/site/upload/files/99849786575.pdfIn PDF document text
    • https://samoinstitute.mn/uploads/assets/file/forogekuwufisatubimidus.pdfIn PDF document text
    • http://kamerton.nl/clientfiles/benelulev.pdfIn PDF document text
    • http://dobraukraina.org/sites/all/sites/dobraukraina.org/files/63271238144.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/48cceb127a551aad8d70be209631fea5/zadorisegesesorezalipape.pdfIn PDF document text
    • http://www.sport-konyv.hu/userfiles/file/71028077695.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/qd361elk7dj6jidulslge62re1/88874688586.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/10252f8632a1ddf780dceee59879e9fe/nonanimomosox.pdfIn PDF document text
    • https://promise-land.com/upload/file/rusofotupokoxaga.pdfIn PDF document text
    • http://assessmentinsight.com/ckfinder/userfiles/files/94438865335.pdfIn PDF document text
    • https://askisan.com/upload/ckfinder/files/21414591487.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=how+to+crop+a+pdf+in+adobe+acrobat+proPDF 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_off0000e150.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE150 16588 bytes
SHA-256: fba9ed8cf199e61f93c3d471404616b34fd649e5e4f850f8900291bed422a67f
font_01_sfnt_off00010c2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C2A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012441.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12441 10616 bytes
SHA-256: ff90d8f79e44ce11b6d1e2adafabeeef66b726701aa6e0ddbca7e18e79ace908

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