Malicious PDF — malware analysis report

Static analysis result for SHA-256 c36e8022a6097c3b…

MALICIOUS

PDF

152.9 KB Created: 2021-07-07 09:16:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 020a54472a89f5cd7e2e318d7c283bdb SHA-1: d8a81968af4c7a6d125e4c5b01bd8fef850a1740 SHA-256: c36e8022a6097c3bd3dc22b3f4695050de2d699083e6573451d2aa5a341a103c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress upload directories and disposable hosting domains, indicating a link farm designed to redirect users. ClamAV detection and ML classification strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9920

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://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/dn1g1658htftjnajf8r505m16f/98610998528.pdf In PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608c8b0af241a---mufuzorodesadu.pdfIn PDF document text
    • http://vce34.ru/attachments/file/bazamavipe.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/18486dad68f8482da362ba78b4e919fc/zulud.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/gme2ehts24d6r90f28b48qs4v2/70415072790.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160795e50e9274---72508172756.pdfIn PDF document text
    • http://grabnerestriche.at/sivuvaxi.pdfIn PDF document text
    • https://peptidturkiye.com/ckfinder/userfiles/files/4030361488.pdfIn PDF document text
    • http://akicgiyim.com/userfiles/file/65573278974.pdfIn PDF document text
    • http://land89.com/ckupload/files/53578804339.pdfIn PDF document text
    • https://foxtailmag.net/wp-content/plugins/super-forms/uploads/php/files/2dab016d4ecab8647c2127212110753e/gokewanefoxuzevapiroseri.pdfIn PDF document text
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/6keusc7bj0762bl1h1oe60rfk6/rejekafadizagixavez.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/0666d8eb40388e8216e4b17662aac289/worebig.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f891804744---21331930812.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fdb46302ff---12859177640.pdfIn PDF document text
    • http://bawaconstructions.com/editorData/file/34020914568.pdfIn PDF document text
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/941d7f672ca645b78cd8356a5b1a5fe4/dokuwovugog.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/a76322e88522a4dcd1682946b18b13c6/2192772020.pdfIn PDF document text
    • https://absolut-fit-and-dance.de/wp-content/plugins/super-forms/uploads/php/files/7sjge480eq5qretkoeuv95pve2/vudusizafe.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/94102394833.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab9c6bc4fc5---52849507140.pdfIn PDF document text
    • https://saam.vn/images/content/file/jovanubatojoxapi.pdfIn PDF document text
    • http://ibiforstarlight.org/clients/3/3c/3cfcca4e360ca8807b7dd7d6e7cbeae0/File/42127889939.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=mass+of+silver+atom+in+gramsPDF 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_off0001f760.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F760 10616 bytes
SHA-256: 489ddae2a38c3050e2bf0d6738ce36dca2f39f79aa8566bbc5bb01b762913c59
font_01_sfnt_off00020fab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20FAB 17588 bytes
SHA-256: 5b17122513e19c114b139dec4010d7ed807443404b92dcba9329b6f9f41b8efe
font_02_sfnt_off00023dd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23DD2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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