Malicious PDF — malware analysis report

Static analysis result for SHA-256 de0b76702d53311a…

MALICIOUS

PDF

113.5 KB Created: 2021-06-28 23:07:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 21949938b93a88afd8124c0b30c582c3 SHA-1: b1aef862eea2d7e2f926d74b067681ccba4565f4 SHA-256: de0b76702d53311aae825b4b6ccb4adea55ce7262e65a16b1e232c5da5e9c04b
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://jetaime-shop.com/files/53687891415.pdf In PDF document text
    • http://staropolski.net/Upload/file/60659050247.pdfIn PDF document text
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160b1399597cc8---13651677382.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b42944e0e62---81076790033.pdfIn PDF document text
    • https://j-kowalewski.pl/uploads/userfiles/files/viwobenebekozuwasavenep.pdfIn PDF document text
    • http://capmar.eu/userfiles/file/xizanikorenokego.pdfIn PDF document text
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608b97a885167---mirodisegepureribuzen.pdfIn PDF document text
    • https://misionesmedellin2030.com/wp-content/plugins/super-forms/uploads/php/files/dhko24d6i1lifusveb6dk4nccv/51300653719.pdfIn PDF document text
    • https://hirurgija.me//files/giwamupipugunixamama.pdfIn PDF document text
    • https://iveducentar.com/uploads/assets/file/feboboxo.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/ruk5mh1mnk05gt3o8vrcutgncq/kuzosijogalunezijekilo.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608735438efe9---76540906908.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160971975f04b3---xesapenimaf.pdfIn PDF document text
    • https://najlepsze-w-polsce.pl/uploads/mesinavumenatusof.pdfIn PDF document text
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/16086c5d26fe02---jejowipurazanojafevisorav.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c2d1a3313aa---kawokolazebo.pdfIn PDF document text
    • http://clubesquilacoma.com/uploads/files/49372641879.pdfIn PDF document text
    • http://placc.info/up_image/65841245575.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074a65d5a065---luzutafaj.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2d4ac1d30---68696786919.pdfIn PDF document text
    • http://plncse.hu/php_data/file/sijifojewig.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/s652a9746gujaotgb2781rfppo/sitojelonajabodakimigojom.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=the+blacklist+the+endlingPDF 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_off00015a96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A96 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000172a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x172A8 17636 bytes
SHA-256: 34a84f6c40ce9d48128db2ea201fe7a2cc06c51d44ac85ee018abf9bca4330ef
font_02_sfnt_off0001a0e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A0E1 10624 bytes
SHA-256: cb1254a25c7aadd9416a4383b497660aa4eeea4158e0f60e597d6bf07ab464eb