Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e9f148408faf38a…

MALICIOUS

PDF

86.3 KB Created: 2021-08-13 12:34:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: b783576789bd344837e2bcf8dc62d426 SHA-1: 936fc722070ace213c66f34bc8c994988fb0507d SHA-256: 3e9f148408faf38afbc287517add8c274007056bf2da393d867220ce60e85f96
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many pointing to compromised CMS uploads or disposable hosting, characteristic of a link farm designed to redirect users to malicious sites. While no scripts were explicitly extracted, the presence of a link farm suggests an attempt to lure users to external resources, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7f09cefb6---44114116388.pdf In PDF document text
    • http://gianniarnaudo.com/userfiles/files/diripogatiwotukujosolojoz.pdfIn PDF document text
    • https://artlabjo.com/userfiles/file/93433500072.pdfIn PDF document text
    • https://wulf-sanitaer.de/wp-content/plugins/super-forms/uploads/php/files/p3bpp2jqid6umus4k4c2hacc8s/vizokikidugufawisizirutem.pdfIn PDF document text
    • https://finatwork.com/userfiles/file/tokubelakafinitu.pdfIn PDF document text
    • https://sieompaysdebray.fr/lesiom/txt/imgadmin/file/24841825574.pdfIn PDF document text
    • http://webinside.pl/userfiles/file/8298835575.pdfIn PDF document text
    • https://dichvumayphoto.vn/webroot/img/files/foselanusixidex.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/cc4hujkja9qkc8368isfje27e5/vafikekexu.pdfIn PDF document text
    • http://debeight.net/UserFiles/File/64101334269.pdfIn PDF document text
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/1df5a1abf72812eb1e818ebef98a50fc/52949903955.pdfIn PDF document text
    • https://chiuman-hk.com/images/file/4831491385.pdfIn PDF document text
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/bf8127123eda6827a00a7e24e53db7b0/zavixovebipoxixo.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/0gqmmrt0gtfv4tqad62jpi8796/57824258416.pdfIn PDF document text
    • http://24horasnoar.com.br/ckfinder/userfiles/files/50772312213.pdfIn PDF document text
    • http://tourister.kr/userfiles/file/xozinubakesopuzeva.pdfIn PDF document text
    • https://clubkdo.fr/img/pics/files/rekuxixizoperi.pdfIn PDF document text
    • https://alzubidi.com/userfiles/files/fobinefafi.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16085f79603da8---savolixureregedumukafom.pdfIn PDF document text
    • https://rosycaffe.com/file/12540319772.pdfIn PDF document text
    • http://reicar.dk/userfiles/file/wibizojamonotipolunikixa.pdfIn PDF document text
    • https://invest.pl/userfiles/file/mawubalinurejozigibukeso.pdfIn PDF document text
    • https://aronabritcan.com/userfiles/file/96629320213.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=problemas+resueltos+de+matematica+para+primer+grado+de+primariaPDF 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_off0000e7dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7DC 18804 bytes
SHA-256: 6ee6b136247483fd8274ccdce9e0ea6e476fe3c040a43343fbde19fa239ef0b7
font_01_sfnt_off000116e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116E5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012efc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EFC 10996 bytes
SHA-256: 74f010b3ad04450bff866fa0e1d1ed2c0e94b77ec826702a6838da85bdc870ff

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