Malicious PDF — malware analysis report

Static analysis result for SHA-256 144f29385dc28df4…

MALICIOUS

PDF

93.1 KB Created: 2021-09-01 10:01:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 3852f01289151cc43c8ed488d40c2925 SHA-1: 4b421d90cb194cbf1a0b6d616dda3b04d8f6256d SHA-256: 144f29385dc28df4e1e698bb31372b8b9ca6ebf180e6e7f01cc36676ad55d68d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains JavaScript actions and numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The presence of JavaScript suggests it may be used to facilitate the redirection or download of further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 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.
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. 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
  • 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://kanalprofi.at/UserFiles/file/39652726303.pdf In PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/7e16030c45dbbfcf6d6415a1ef80e5f3/68797611265.pdfIn PDF document text
    • https://pharma-tools.eu/galeria/file/84162920028.pdfIn PDF document text
    • http://cyklo-sport-servis.cz/UserFiles/File/73930087040.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/295732hkdqv7kek2lvvrfu4bge/juwimidopatonegi.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac5d0fb498e---84228624564.pdfIn PDF document text
    • http://novichiha.ru/pic/file/zuralixurutujite.pdfIn PDF document text
    • http://scea.edu.mn/ckfinder/userfiles/files/93513310721.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160c4b1dc7045c---6986014280.pdfIn PDF document text
    • https://kanalprofi.at/UserFiles/file/suporadewageverukunuwi.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/149e03567a47d9ce8ddec9b8689f963a/49981489661.pdfIn PDF document text
    • https://parklanehotel.asia/userfiles/file/2663010622.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/nemshasbs98flv6c8olrkftdit/51204315094.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1608066b39ead7---xesovarinaxubarinefuwo.pdfIn PDF document text
    • http://baschin-heizung.com/meineBilderAlbertGrundschule/file/26458807282.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070094219661---fozovofeno.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/ouhuhgl4au8ll8aud471oaqsem/vizisevabopit.pdfIn PDF document text
    • http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/xologosafaligobu.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c3a5528413---54777075234.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074cd1a7b784---gemesa.pdfIn PDF document text
    • https://euinsuti.ro/app/webroot/files/userfiles/files/97458178572.pdfIn PDF document text
    • http://ekogamma.pl/javascript/ckfinder/userfiles/files/18815019890.pdfIn PDF document text
    • http://taxiluzern.ch/khurasan/userfiles/files/92581848172.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160eca6df5fdac---36265008186.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=permanent+pacemaker+implantationPDF 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_off00010797.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10797 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011fae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FAE 10460 bytes
SHA-256: cedf0ccaf3ce1528a20d9c0de089e8f9cd831f70cbc2ce22075a084094eadd16
font_02_sfnt_off0001375d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1375D 17756 bytes
SHA-256: e8811d59e3e8212ff335e2f2fd7164c52946bbb975bb6f78338a99898c0b8717

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