Malicious PDF — malware analysis report

Static analysis result for SHA-256 37c2d022f3c6e46a…

MALICIOUS

PDF

111.3 KB Created: 2021-07-16 01:24:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a7bb14ad14be73669ded917819b5f7b4 SHA-1: 9b4ac5332bbb3ae15ad2392bfc2ebf1d5fad27f1 SHA-256: 37c2d022f3c6e46ae7c12f99b8fc5b164c62625312ced8833c38db5855187039
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with many URLs pointing to compromised CMS upload directories, suggesting an attempt to lure users to malicious content or exploit vulnerabilities. The presence of numerous links and the use of compromised hosting indicate a phishing or spam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9330

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.
  • 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://gdbchurch.com/clients/43262/File/roxuboxexogalorijim.pdf In PDF document text
    • https://binarbaidrealestate.com/public_html/userfiles/file/paledog.pdfIn PDF document text
    • http://constantemail.com/userfiles/file/162387392827796746112.pdfIn PDF document text
    • https://kovosluzba-praha.cz/res/file/kolisobebufazuxusug.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/f62234bc989e7944e0898c9d0aa27dcb/1540358550.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/1606da566dbaef---3479056994.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/95ae1a31a1d73f96ccc8ecdd1fb01894/nigedumasupomowap.pdfIn PDF document text
    • https://askisan.com/upload/ckfinder/files/47629460614.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609abd1cbef57---jotazu.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608823c8e4c86---91364093653.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609fe571a408b---zikosajili.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607d063c6fc66---bowowivoz.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/4u96obribbc1eddabani4o4ain/gudujuruzigovumawekalux.pdfIn PDF document text
    • https://fultoys.com/userfiles/jufisisuwilawojekadad.pdfIn PDF document text
    • http://calzaturificiocatia.it/userfiles/files/totobadanetamuni.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/988cba904bdedb05ddf3fc3694fe5821/31393265596.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608185a35432b---37338584067.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e8d6dbfd1d---dasetumenamejikenawa.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1607b2cba794a2---nokijon.pdfIn PDF document text
    • https://llibreriaha.com/img/events/file/53801121756.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210505084448471.pdfIn PDF document text
    • https://fenixfalt.com/userfiles/file/tuwerokekajexubo.pdfIn PDF document text
    • http://apvn.info/userfiles/file/pusitumefadakiwidavivew.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/3810790fbb8457484521c7f23f5abb76/53762738104.pdfIn PDF document text
    • http://www.zywawiara.pl/pliki/99017213375.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/mu4bqv146l9vdh8aaq5esprtd5/ginotevizaguduvuvok.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=saudade+meaning+in+englishPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012495.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12495 16724 bytes
SHA-256: 5d454a11a0f432e3e0337a2f7581ec7962ea563afd6eda13414bdb2287bd721c
font_01_sfnt_off00013c6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C6F 2172 bytes
SHA-256: d6cf6faef166cd71d908b4e96ee32d69a8881721ea6a8c916efdd29b1d4d9ca7
font_02_sfnt_off00014627.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14627 21712 bytes
SHA-256: f19523682fdd2d041a478061e1dd4aee6247f9469862a1f12d702a7237823869
font_03_sfnt_off00017d92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17D92 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off000195a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x195A9 10552 bytes
SHA-256: f3dc842be3ac326cf29c0efaa54b6b1ec2b5a363e4e3d565a26d31f4f231c06d

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