Malicious PDF — malware analysis report

Static analysis result for SHA-256 02517c9854121293…

MALICIOUS

PDF

84.2 KB Created: 2021-09-14 12:37:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 03edddf19a3196adee5248c134498747 SHA-1: 12f6aec135b85ed289942b181474c5a8960162e6 SHA-256: 02517c98541212936b31350edc3770fa2e00fc4b27b3d40c1fb2823b175a12ae
164 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external links, many pointing to compromised CMS upload directories, suggesting a phishing or credential harvesting attempt. The presence of a 'download button' heuristic further supports a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://gz-chengeng.com/uploadfile/files/8396638511.pdf In PDF document text
    • http://architettodrabeni.it/userfiles/files/boxolutudetomuso.pdfIn PDF document text
    • https://xn--espaoldetalca-lkb.cl/var/www/html/upload/file/87669132838.pdfIn PDF document text
    • https://stmpallet.com/ckfinder/userfiles/files/21358966931.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/ecaf8b0e224f2b66afa37c96ee6ee70d/romonujajiruzor.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/h7ujbpjljmhr9dpko3abk3413u/zakipegomexotewij.pdfIn PDF document text
    • https://siliconautomation.com/userfiles/file/baduvitawugawajunotudet.pdfIn PDF document text
    • https://thepainter.asia/upload/files/gosukumefexavetejitopa.pdfIn PDF document text
    • https://shen-su.eu/gfx/userfiles/files/12413531470.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613d470e4feed---matapeniwusisibabup.pdfIn PDF document text
    • http://margheritango.it/userfiles/file/bopewumi.pdfIn PDF document text
    • http://energyexcess.com/userfiles/file/87291386657.pdfIn PDF document text
    • http://abwessex.com/uploads/files/66236245012.pdfIn PDF document text
    • http://www.perchegouet.com/ckfinder/userfiles/files/89807590098.pdfIn PDF document text
    • https://bharatiyabhashaparishad.org/ckfinder/userfiles/files/60416409470.pdfIn PDF document text
    • http://bong-dem-long.org/upload/editor/files/29134297036.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16130867a481f9---88063657718.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/uatanj7rup0fvc517hl52gd5eg/vakexopaxametololod.pdfIn PDF document text
    • https://gizaviation.com/uploads/files/suluwekoxo.pdfIn PDF document text
    • http://friulanamarmi.it/images/file/kukojurawo.pdfIn PDF document text
    • http://www.me.ntou.edu.tw/ckfinder/userfiles/files/20210913_060652.pdfIn PDF document text
    • https://umartravel.com/files/fasesarazetekovedeja.pdfIn PDF document text
    • http://polesprogettazioni.com/userfiles/files/sujiloloxipo.pdfIn PDF document text
    • http://ketphatthinh.vn/upload/files/11926851310.pdfIn PDF document text
    • https://proetcontra.hu/userfiles/file/fidofiteputunobonun.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=custom+rom+poco+f3PDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e319.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE319 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fb30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB30 10408 bytes
SHA-256: 8b126192dc744b78d5646c3d2f119edf9694a400ba474034738b2532c919b77a
font_02_sfnt_off000112da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112DA 18452 bytes
SHA-256: 26d0c43012e312c194427d6a4c58a9a952ebac42810ebbcf1a719e736b94ad0b

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