Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7923394703a6a30…

MALICIOUS

PDF

85.9 KB Created: 2021-06-29 01:21:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: be659a5ff58dc60be296f055bcf028ef SHA-1: e2fe25002ccf1e2b628d7d65ba6cbf41bb887d76 SHA-256: b7923394703a6a3072963dbb30c1a0717b630ba7a726a447f7bef0af95976931
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically identified as a phishing trojan by ClamAV. It functions as a link farm, containing numerous embedded URLs that point to compromised WordPress sites and other disposable hosting domains. The primary purpose appears to be directing users to malicious content, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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 https://crewmak.ru/uplcv?utm_term=the+miracle+of+a+mission PDF link annotation
    • http://almar-bus.pl/userfiles/file/sitekekepi.pdfIn PDF document text
    • http://romanakladatelstvi.cz/userfiles/file/mojuzawodar.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/9203891bb230e0b07fad0bf8cf8f40ef/80101201239.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/eb76012d745a790a02072f3b1dd9b5ea/67135960736.pdfIn PDF document text
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/2f8c3cd629eef69cc2e81c356f497aab/kilamipasaxugovuri.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/bcb518a2e3c52818a2ef9c80ac885153/29033874252.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607975b6b2e50---zimopuguweviwinuv.pdfIn PDF document text
    • http://aaaexpressac.com/userfiles/file/90403211603.pdfIn PDF document text
    • https://livre-art.com/ckfinder/userfiles/files/56021133716.pdfIn PDF document text
    • http://asbufestival.com/uploads/FCK_files/file/nutoz.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/627d11875d8423c195c3f83cc4c33730/xidudutalirejizubon.pdfIn PDF document text
    • http://gocreate.termall.pl/upload/fck/file/86603644666.pdfIn PDF document text
    • https://silverlabpupsforsale.com/userfiles/files/vedivigudonir.pdfIn PDF document text
    • http://xn--80aab8aioy.xn--p1ai/userfiles/file/74291383275.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/1173f6c5a3c5e27706d69ecf0192ea40/72455830753.pdfIn PDF document text
    • http://www.pzkexie.com/up_files/file/nisibufojaram.pdfIn PDF document text
    • http://musorcentrum.hu/files/article/file/29643822811.pdfIn PDF document text
    • https://www.leeja.co.uk/wp-content/plugins/super-forms/uploads/php/files/824e2ca99e2ae2c98705cb3200d13bc6/gomokalib.pdfIn PDF document text
    • http://akicgiyim.com/userfiles/file/91504130447.pdfIn PDF document text
    • http://hart-metale.pl/gimnazjum/userfiles/file/tabepat.pdfIn PDF document text
    • http://4bx.pl/public/file/96544243155.pdfIn PDF document text
    • 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_off0000ea97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA97 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000102ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102AE 10464 bytes
SHA-256: 5650b09f2560fcd8a34c26406c5f821b36cc31fcec1853d5ab46081f919c4cee
font_02_sfnt_off00011a31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A31 17780 bytes
SHA-256: 46cee1569c63f9ad89856a3a859fad8a1214d0ec9bce7f09925eb3c1db0121bc

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