Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab7e75f9cc6f4782…

MALICIOUS

PDF

86.3 KB Created: 2021-07-18 19:02:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 39b65ac50550b24e664e93e2aabc9a98 SHA-1: fb92f933d2ca1efd283fb74954fc8a51fb559149 SHA-256: ab7e75f9cc6f47822ef35d92883800d2f95178bad493c19377110bb0c09716c3
164 Risk Score

Malware Insights

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

The file is identified as malicious by a ML classifier and ClamAV, and exhibits characteristics of a phishing lure. It contains multiple links to PDFs hosted on compromised or disposable domains, suggesting an attempt to distribute malware or phish users. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://placc.info/up_image/dasonadulodatezenosirero.pdf In PDF document text
    • http://www.dfdtrading.sk/ckfinder/userfiles/files/gebifozazolazobixiliro.pdfIn PDF document text
    • https://pametnidom.hr/pametne_kuce/userfiles/file/bapetarawekewutibebapag.pdfIn PDF document text
    • http://urbancollab.com/userfiles/Proj_Name//files/55399588044.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d953956037d---goboradikuwagi.pdfIn PDF document text
    • http://unionzglobal.com/ckupload/files/26048733673.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2ac7c39c89---46454271824.pdfIn PDF document text
    • https://medgarlci.com/wp-content/plugins/super-forms/uploads/php/files/4d6df0fb7933524ed617ebc39a1ff4ba/37938662123.pdfIn PDF document text
    • http://prime-standard.com/piceditor/file/43608512017.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/bc2aeb0493a254954116e077d65aa434/sokas.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/35cdc7c09d3729a9be4475adac70b3f3/bamixaxuwofuzivorexeme.pdfIn PDF document text
    • http://ownlines.com/upfiles/file/26025372973.pdfIn PDF document text
    • https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/30ec0069c2e4d432a1fea1d0f00d760c/39307540007.pdfIn PDF document text
    • http://xn--365-pn7mwb654m2qn.com/ckupload/files/gazetusanuloxagijaroze.pdfIn PDF document text
    • http://taxicityplus.ru/userfiles/file/95753891745.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0701e58f46---sobipedijug.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f30f737001---91041887518.pdfIn PDF document text
    • http://alhouti.com/userfiles/file/51653863274.pdfIn PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/89a798b53a36256250b70e8edfc0a77f/labelevebewap.pdfIn PDF document text
    • http://gewoongroen.eu/app/webroot/files/userfiles/files/kividu.pdfIn PDF document text
    • http://dermalab.pl/userfiles/file/gepekibokoguxabe.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/2ae47e19beeed95caf6810c0f367594f/gaputexusu.pdfIn PDF document text
    • https://chmelo.hu/sites/default/files/file/96662570242.pdfIn PDF document text
    • https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/d8d24801d15561b17b0bb4218c19154b/ginagi.pdfIn PDF document text
    • http://dent-pro.cz/pic/file/vufazupasusipawed.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=how+to+undo+deleted+messages+in+instagramPDF 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_off0000ed6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED6C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010583.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10583 10768 bytes
SHA-256: f3f2e707b1a7db3ab02d639e2f399736af59fcda236bdff8d07ef58e54159b35
font_02_sfnt_off00011e12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E12 17448 bytes
SHA-256: 3ef9fa86ae496d48788a68b7a305ee186e9aa2750ee375e45f3a6ba787f1330d