Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc2eebe4f4c8cf72…

MALICIOUS

PDF

77.0 KB Created: 2021-09-04 21:55:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 27de5262d6c29d4103bfb0c6f239b596 SHA-1: 5b17a377d91381a681d18ba5cb333843f7984bf2 SHA-256: cc2eebe4f4c8cf72c773ed32e929ccf04bbebce3dba17d58f9752c16ec9b3eff
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan-like behavior. It functions as a link farm, with numerous embedded URLs pointing to external resources, some of which are hosted on compromised CMS uploads. The primary purpose appears to be directing users to potentially malicious content hosted on these external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • 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
  • 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://asianmosaicnyc.com/userfiles/file/jegarimepajodam.pdf In PDF document text
    • https://eurocomm-italia.com/file/41072515317.pdfIn PDF document text
    • http://dalaichau.com/files/mitexelixedegefonagido.pdfIn PDF document text
    • https://get-insurance.in/ckfinder/userfiles/files/80716102038.pdfIn PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/at1tmfgpklm7cmpedcd85liriv/zolaxonoluw.pdfIn PDF document text
    • https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/k6rbaua8ckgfk5659rg513okf6/2883247637.pdfIn PDF document text
    • http://pamatudarbai.lt/ckfinder/userfiles/files/zagigaferu.pdfIn PDF document text
    • https://betenenergy.com/sites/default/files/file/sizededataxajijexedosa.pdfIn PDF document text
    • https://mzr-avocats.com/buddha/ckfinder/userfiles/files/wunalesosabiresevodor.pdfIn PDF document text
    • http://lapawan15.com/shop/fck_file/file/69951359483.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/8d6cc56d19353ffcc00e732e5bf8e42c/92998159168.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/2143ec7f1845cba7d8e4d19420d850ad/87682137072.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16085bac2d6018---94923328389.pdfIn PDF document text
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c8553ad1072---banulefivuxejibejipo.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16099cbbe4b82c---2024629646.pdfIn PDF document text
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0b0eb6edb---tafosisuloguxinu.pdfIn PDF document text
    • http://wsp.pl/userfiles/file/18902339862.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/g3vb0b147j4p5cggus7kg4lv5a/vefozefimukepuwis.pdfIn PDF document text
    • https://marathonroller.com/userfiles/files/xalonosamemiwi.pdfIn PDF document text
    • http://snft.ro/media/file/23520598460.pdfIn PDF document text
    • https://saintarseny.ca/sites/saintarseny.ca/files/file/gufun.pdfIn PDF document text
    • https://weekendtripskolkata.com/userfiles/file/kezitekewip.pdfIn PDF document text
    • https://happycolaborativo.com/uploads/files/wakizixare.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=muscular+system+review+pdfPDF 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_off0000c8fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8FC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e113.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE113 10916 bytes
SHA-256: 9fab4971d247b5f4c84eb0971bf519e33cd8170ca00b3b3d6020b0732d7dd087
font_02_sfnt_off0000fa7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA7B 17156 bytes
SHA-256: 087da4abc9a2e38f499b5455f9f173798c606cfe938d1b3efa806c22b743f7cb

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