Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc1942201f4b75c5…

MALICIOUS

PDF

94.0 KB Created: 2021-07-03 00:16:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e0518629e46c6c5d0eb24e102c6cae0f SHA-1: b1ee6ac527df262b58b9680214ae97ac3574d1b9 SHA-256: bc1942201f4b75c5f7cf508308951e8239613b81b4bc90bb39cc993763b42063
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a phishing or redirection attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to lure users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9866

Heuristics 7

  • 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
  • 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 http://bundoreh.com/fckeditor/files/file/majenudugiziw.pdf
    • http://wallacewilliamsfamilyreunion.net/clients/6/66/662ca4338cd1fa41fa93b88222973dc6/File/rizikupiwuzututobirex.pdf
    • http://alexanderkanevskyartgallery.com/clientMedia/file/39037897357.pdf
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/0328b275f76c3596a4d184047b00e550/1641404780.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a562ba8251---feboxofuvigutirukiwa.pdf
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c59b4cbb208---7233609891.pdf
    • http://nassagroup.org/app/webroot/js/ckfinder/userfiles/files/30675835752.pdf
    • http://www.colormotion.cz/UserFiles/file/xilerokotenusulizanirime.pdf
    • http://k-yoga.org/file_upload/spaw_upload/file/20210507194551.pdf
    • http://olsztyntransportmedyczny.pl/userfiles/file/85980915853.pdf
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de15f924c3e---fadisosewajoj.pdf
    • https://foulardfotografando.it/file/61595986712.pdf
    • https://floraplant.gr/FCKeditor/userimages/file/devezevadana.pdf
    • http://premsaktidal.in/userfiles/file/rigipowomureje.pdf
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d57b587cb3---8905313723.pdf
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608555c964a23---38997279097.pdf
    • https://amitadevnani.com/userfiles/file/30937316714.pdf
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abed409951f---59073134657.pdf
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/9d39ecfb50d7c07400197d7e0a6180fd/90605445973.pdf
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d64c864660---zetor.pdf
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/160812eae3c524---95119091999.pdf
    • https://eseninternational.com/uploads/files/fusufafupen.pdf
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/2e0bcqipr2ubafu04tsf8cretc/64032414750.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=number+1+dilwale+film
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e991.bin
885b9024a80bd539ee88f4c17c1e1fa3cc6dab475ff5b740ebf17c73a317c9ed
pdf-font-stream PDF embedded font (sfnt) at offset 0xE991 17112 bytes
font_01_sfnt_off00010278.bin
2d2bde8a4597f14f7f8e1ce818eeeb053edf467d54350d2c76138afc0444081f
pdf-font-stream PDF embedded font (sfnt) at offset 0x10278 10380 bytes
font_02_sfnt_off000119f7.bin
deb9e3a79f4387fd6b3518abdd10efa0ca00c1fb5594d0fe61a2206c0bad6252
pdf-font-stream PDF embedded font (sfnt) at offset 0x119F7 1956 bytes
font_03_sfnt_off00012303.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12303 16792 bytes
font_04_sfnt_off00013b15.bin
4066b35d2622f6a28bc41fd7d46ebc6228acefc6deb8fbfa43714548c7b27436
pdf-font-stream PDF embedded font (sfnt) at offset 0x13B15 17800 bytes