Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2d387e6300176c7…

MALICIOUS

PDF

86.3 KB Created: 2021-07-23 12:16:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: c21f2044ed42253e3cb955f819169562 SHA-1: d5be4462bf5f490f513a0d3950306b19cb9c17e3 SHA-256: c2d387e6300176c7d535dc7570f26525f9ed0d87d80ab07499ed96a4143764ef
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adb94674cec---sifunokababuxusubus.pdf In PDF document text
    • https://aimhc.com/userfiles/file/nabozunaloxerite.pdfIn PDF document text
    • http://xn--80age2amlc.xn--80adxhks/pics/images/file/kivusupezapibezafaxovube.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/o5tejhfvi9k9i2em23thcqipv8/lurefadutatuf.pdfIn PDF document text
    • https://soft-print.pl/app/webroot/media/files/89573709270.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609434782cca2---gikiritigotawu.pdfIn PDF document text
    • https://angkoronetour.com/userfiles/file/66090245690.pdfIn PDF document text
    • https://tidaksusah.com/contents//files/5886884974.pdfIn PDF document text
    • http://school19-zav.ru/userfiles/file/sadub.pdfIn PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/aa6873867d423afb1ed8133d6ef38f20/tukivafevadebog.pdfIn PDF document text
    • http://pronobile.de/catalog/file/sutabazodunikulalalub.pdfIn PDF document text
    • http://mazurubezpieczenia.pl/zdjecia/fck/file/nugijokumodukosibub.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d59f1600df3---jebilibexolazodin.pdfIn PDF document text
    • https://www.zolmedis.lt/ckfinder/userfiles/files/vovoni.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/609b4f1133b0d95c26a76723ccacd37d/rasinusarifobofo.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c92ff7aee2---19225041580.pdfIn PDF document text
    • http://irina-beha.com/ckfinder/userfiles/files/golejafejosezalipij.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/1122162e91860597a60194bdaba33aaa/21113110147.pdfIn PDF document text
    • http://telmeed.com/web/ckfinder/userfiles/files/jinefojijopuritisapalumel.pdfIn PDF document text
    • http://emekyesiltepe.net/images_upload/files/viwufuwiwoweverijofatif.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16091040f6f88e---90560142564.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4a12b741e---gugekowixetuzunikulok.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=pelvic+prolapse+repair+without+meshPDF 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_off0000ecab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECAB 10788 bytes
SHA-256: 1b110592b88483f99e51295ab40dc6f365cbd5a81c6b6e78bc7a0cc24f0954a1
font_01_sfnt_off0001059f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1059F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011db1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DB1 16760 bytes
SHA-256: 2fbd8f37951b9583588108679f5011ddf0e659742a39ccc991d0e0b0fd3ed57e

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