Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ff0465b72f2c2dd…

MALICIOUS

PDF

85.9 KB Created: 2021-07-21 01:13:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: dc60bf84621a0304085f62185208d549 SHA-1: 6e1407adc27eccacacf5f50debb6d80df2bb4749 SHA-256: 4ff0465b72f2c2ddb39aa3405d433e8894a300a378e0124146d3c93e8e8e1a89
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests malicious intent. The embedded JavaScript likely facilitates the redirection to these malicious links, which are designed to host phishing content or further malware.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4152

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d795d800048---14926039576.pdf In PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/ir0igcfk8ahmv70p4duduhf6g5/62236171351.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b116bf3ec8c---38252870907.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160df9324a996e---zepofekusabuwozunajebu.pdfIn PDF document text
    • http://border-inn.com/CKEdit/upload/files/6408977720.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/tevk8red5ncsd63t4fberqp27q/likokiz.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160c9d0dfc73d0---60838880197.pdfIn PDF document text
    • https://serwisnawigacji.pl/userfiles/file/pumobajasevanonisusilalep.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606d43576b9a0---limixikiwe.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c5ecb38a5a2---zasoraparigafife.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c219cc65e01---99354698552.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/disiwodusiloxi.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad2a0eb003---59685617051.pdfIn PDF document text
    • http://mxagproducts.com/upload/browse/file/purex.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b41921e211---20462812010.pdfIn PDF document text
    • http://ccshecea.org/upload/files/rafaxaguwebonus.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2700aeb3e3---10420307284.pdfIn PDF document text
    • http://chocoenglish.com/_UploadFile/Images/file/tamapemalavibuja.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/olni89veb4ovdsfagiid71k8t5/10898201594.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16071ec0f4cc56---bolokod.pdfIn PDF document text
    • http://gok-maciejowice.pl/js/ckfinder/userfiles/files/59185013355.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/9394a44ca77fb17accee9348a206f2db/putinadazarulaje.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/2b5b6b830c7378e6863411db5e8f3593/xavoralenubopejovum.pdfIn PDF document text
    • https://implant-drill.com/userfiles/file/43909528507.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=uhf+ultra+high+frequencyPDF link annotation
    • 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_off0000fda7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA7 17696 bytes
SHA-256: 6256c9150ca2f11e15175265e7caf2fcbf2daef16422ec7d731b1fc73e464cf0
font_01_sfnt_off00012c19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C19 10692 bytes
SHA-256: 5e807f0eb0b359ba16351007b5fa8af19b6fea67b209af2c52fc7b39be0933f4
font_02_sfnt_off00014445.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14445 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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