Malicious PDF — malware analysis report

Static analysis result for SHA-256 201e0bcbb4e5dca0…

MALICIOUS

PDF

78.9 KB Created: 2021-09-13 07:18:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: b1c2da84933f36c80a2dfc15f32e2db0 SHA-1: fd424270cbfe4ebdb68e9ed8b84f89e02b4f3e06 SHA-256: 201e0bcbb4e5dca0b2bc3e682648283bf527e5e6ca748a1d5993c065e43a3c2b
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and a large number of external URIs, many of which point to compromised CMS upload directories. This suggests the document is designed as a link farm to redirect users to malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier clean score 0.2287

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 https://stallion-international.com/userfiles/file/19642343891.pdf In PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613714d1602df---18904222948.pdfIn PDF document text
    • https://classoft.ro/userfiles/file/98918627720.pdfIn PDF document text
    • http://futuralagoparking.eu/userfiles/files/wowivobadodubibopuligib.pdfIn PDF document text
    • http://33podarka.ru/pictures/files/38968786308.pdfIn PDF document text
    • https://valstybestarnyba.com/upckfinder/files/20362756060.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/186461f2f3f134596bab30d3fba33a41/12139156629.pdfIn PDF document text
    • https://sdudyogtechnologies.in/ckfinder/userfiles/files/kagoxexifinopexivefim.pdfIn PDF document text
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/16139fd4fb0602---40752408443.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613661ce98778---27444267052.pdfIn PDF document text
    • http://rambud.pl/uploaded/file/2011873949.pdfIn PDF document text
    • https://grdr.org/paidel/ckfinder/userfiles/files/jolezoxebozodita.pdfIn PDF document text
    • http://anhuizhkj.com/upload_fck/file/2021-9-10/20210910172920169097.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/cf9e716d0e300e272354861b4198da0a/fumagotivovavatalubejepa.pdfIn PDF document text
    • http://studiogalata.it/userfiles/files/disakasakoduge.pdfIn PDF document text
    • http://www.waetsukai.jp/system/ckfinder/userfiles/files/dobixuzanobuvufapasine.pdfIn PDF document text
    • http://zsmnowakowski.pl/userfiles/file/tirukum.pdfIn PDF document text
    • http://tries.cz/media/images/upload/file/47107262554.pdfIn PDF document text
    • http://veterinariacomportamentale.it/userfiles/files/jenixemerefanebipewomatip.pdfIn PDF document text
    • http://frutapac.es/ckfinder/userfiles/files/zumejumevapuxawanuvixiz.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/fklg7rhtn0pq4fds9n68uelje6/22696823172.pdfIn PDF document text
    • http://sosonomo.com/ckfinder/userfiles/files/94925191550.pdfIn PDF document text
    • http://tndgdemo2.com/ckfinder/userfiles/files/66201885706.pdfIn PDF document text
    • https://areopag.ru/sites/default/files/uploads/16286615386.pdfIn PDF document text
    • http://nanchang.chinatupai.com/web/js/ckfinder/userfiles/files/xuvurosupagesikefemitigaz.pdfIn PDF document text
    • http://holmeslawfirm-iowa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/51901911588.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=six+thinking+hats+book+pdfPDF 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_off0000ddfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDFA 10908 bytes
SHA-256: ed297fd86ac81b39ed5737e6c6568ec9e30118bcff20a64a6529101466bfbb8a
font_01_sfnt_off0000f6b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B2 18156 bytes
SHA-256: c3582e077f429403b662c2fc1272add6f1b0819f7fd9d63ece969c99c8467257
font_02_sfnt_off0001265b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1265B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1