Malicious PDF — malware analysis report

Static analysis result for SHA-256 62ed1e7d2d3041d2…

MALICIOUS

PDF

87.7 KB Created: 2021-07-13 23:31:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 3ecaa98068f88c3e098556bf0469cc47 SHA-1: 1860c260ec3d09c0ea98d7ff9af581b8f56f1705 SHA-256: 62ed1e7d2d3041d2fc6c4c1a95e8d713f0d67c34b457778f4ad2aa42ce1aaa7b
156 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous URLs pointing to compromised WordPress sites, suggesting an attempt to lure users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are consistent with a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9899

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 https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/af5ac5f78c1d3264dd4dc524690cb07a/bexogusokuk.pdf In PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/16096f580324d1---lowotexazeladek.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1609699e884074---93027605587.pdfIn PDF document text
    • https://arvikabc.com/images/uploadedimages/file/jakogexowupizeziwedutoxa.pdfIn PDF document text
    • https://olmitek.by/wp-content/plugins/super-forms/uploads/php/files/japn3h9i6kgnvrfg5kbb0f0173/teganif.pdfIn PDF document text
    • http://ajisushionline.com/uploads/files/vozetakadizimip.pdfIn PDF document text
    • https://whitesal.com/data/images/file/8574_20210529120609.pdfIn PDF document text
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/80f04860c7082c5cad018af9ab63f806/dizebigup.pdfIn PDF document text
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/c9a404085a26c30acb96f9cb641e4cef/77696779006.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a107a59103b---xilijuwamowulunobakiwimi.pdfIn PDF document text
    • https://bbgpiti.com/userfiles/files/18370042586.pdfIn PDF document text
    • https://bustotoronto.com/userfiles/file/pebatenojutexupinitaza.pdfIn PDF document text
    • http://ks4073.com/file_media/file_image/file/769550333.pdfIn PDF document text
    • https://baoholaodong24.com/userfiles/file/28145494423.pdfIn PDF document text
    • http://chronicles.ae/userfiles/files/44228014453.pdfIn PDF document text
    • http://gernano.eu/gfx/userfiles/files/sopukaxiranudedunab.pdfIn PDF document text
    • https://burgaseguros.com/userfiles/file/fowaw.pdfIn PDF document text
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/o7mdv0ogk98bqr2v5rs8nel3nu/19072212866.pdfIn PDF document text
    • https://laughteronlineuniversity.com/images/upload/files/47621100895.pdfIn PDF document text
    • https://osakadentalcare.com/contents//files/dinorudibitepud.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c8ea90994e2---siferir.pdfIn PDF document text
    • http://investin-khj.ir/ckfinder/userfiles/files/91126588027.pdfIn PDF document text
    • https://biorenta.lt/ckfinder/userfiles/files/nojibumuledavet.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d3f162e4221---wowidivakizexe.pdfIn PDF document text
    • http://ttccid.com/userfiles/file/37492982377.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/91198d195f2105e384543b9fbd1a9f29/37850489423.pdfIn PDF document text
    • http://r2doodles.com/clients/4/4a/4a4ed909dcef54c1e3ec6a0ce1d29f2d/File/jaxoxafazeduboxara.pdfIn PDF document text
    • https://marcuspietrek.de/MARCUS/files/file/90685074892.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=monica+wright+kevin+durantPDF 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_off0000f211.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF211 10772 bytes
SHA-256: 136b1a8f79a4e9c351e9b49e94e5683869bd6520e12d3e3db95f67a69adeaa6c
font_01_sfnt_off00010ab2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AB2 17864 bytes
SHA-256: 30ad61a10efb542aaa28b9bb4d71c1797aef4dd65d5056e157d75976b6880f72
font_02_sfnt_off00013955.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13955 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1