Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a61dc2d91f53b4b…

MALICIOUS

PDF

82.9 KB Created: 2021-07-17 11:56:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 5d47a3d559c3beb9581b8515c4b419e1 SHA-1: 72675b0e4568043219f7b50d9eea800cd612acfe SHA-256: 0a61dc2d91f53b4ba950182bb62cd27965cd23ed3ce2706693e1146e7078212b
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external resources, many of which are hosted on compromised WordPress sites, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly indicate malicious intent. The presence of embedded URLs and the nature of the heuristics point towards a spearphishing attachment attack pattern designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/1e106229bc2a728253ace65d6b6b856c/98387282824.pdf In PDF document text
    • http://fitviewer.biz/files/file/zidav.pdfIn PDF document text
    • http://forter.vn/hinhanh/file/bilawumikos.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/qes2vo1mlc53oc8iu2j2gs94g2/9872411782.pdfIn PDF document text
    • http://www.azurwelcomeservices.com/userfiles/file/81762783806.pdfIn PDF document text
    • https://ehlibeytalimleri.com/resimler/files/newaloxu.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a34a309da7a---komovapixifeludele.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/fdf872117240d7b9b868a61b7fa5ff49/wajaduporek.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607baca30c690---92183200288.pdfIn PDF document text
    • http://geometrabottero.it/userfiles/files/rogurokuzur.pdfIn PDF document text
    • http://safarang.com/basefile/files/jeguxatapiwezinorasafube.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/c7ec3126a9a946589a92868c73b6dadf/18802241386.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/2024f9ce43d80feca53375f799619b73/29992382698.pdfIn PDF document text
    • https://ropaalmayoreo.com/images/userfiles/file/32292038620.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607264e2bddb5---zowifuvegegelepeviwag.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/9cbf584a94b5b12a210ef6198dd6739b/rujuzerotodenagosareles.pdfIn PDF document text
    • http://yuli-china.ru/d/files/bobabavukuxewiviworekupat.pdfIn PDF document text
    • http://cadeco.com/testingsites/advantage_aviation/assets/media/file/lilapusamorupogologonili.pdfIn PDF document text
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/7a6kr9riku2e4pr36jk6to04mm/visadipitejusakij.pdfIn PDF document text
    • http://playitdirect.ca/ckfinder/uploadfiles/files/bipurawu.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/f14cc6f6f6bd18b5ee1b8fbaf0320599/ravaninunebuxe.pdfIn PDF document text
    • https://vgi-vn.vn/app/webroot/img/files/xifetakek.pdfIn PDF document text
    • http://fw-simple.com/uploads/files/73280443152.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dfe8f79523---8950765924.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a1d87beb20f---83731629383.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=highest+praises+honor+and+glory+be+unto+your+name+lyricsPDF 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_off0000de2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE2A 17300 bytes
SHA-256: 119e174f2b66f5bb272a4637da2dc7d2615333c7b2959e47253c9b71dde389b8
font_01_sfnt_off00010b9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B9F 11304 bytes
SHA-256: ab6362db1d7db644735dcd9a902fa45772985be67c2ed6c342ea1474d8ba2cce
font_02_sfnt_off0001258f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1258F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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