Malicious PDF — malware analysis report

Static analysis result for SHA-256 941027cb9ef3f7e3…

MALICIOUS

PDF

83.2 KB Created: 2021-07-14 04:52:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 81b36e07f6f6b2820ec042d384da190a SHA-1: 201e6055b1a96240ad8663f2e966462b9d354a84 SHA-256: 941027cb9ef3f7e3c6f252ea6cca64647bab907bb87b933da1afe4f3f03a8521
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as a phishing trojan by ClamAV, indicating malicious intent. Static analysis revealed it functions as a link farm, containing numerous URLs pointing to potentially compromised or disposable domains. These links are likely intended to lure users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3004

Heuristics 5

  • 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
  • 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://dungcubepgiangtrinh.com/webroot/img/files/salulu.pdf In PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609f7c5a957fa---toredef.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16070ec3a2c3a0---16934062029.pdfIn PDF document text
    • http://quaretti.it/userfiles/files/98550442357.pdfIn PDF document text
    • http://lnshiyue.com/userfiles/file/20210617114337_1984826647.pdfIn PDF document text
    • http://anhuizhkj.com/upload_fck/file/2021-6-26/20210626204435325819.pdfIn PDF document text
    • http://alituncer.com/userfiles/file/gagugilonadegolonulane.pdfIn PDF document text
    • http://health-bridge.in/upload/file/devopamuzafisajotegoz.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/e3ef5718b50bf664a71412dafe249208/lavojojapinenamipujakafi.pdfIn PDF document text
    • https://lanjutpt1.com/contents//files/barel.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/16094a4c96a250---ruruzisos.pdfIn PDF document text
    • https://tomorrowhubs.com/upload/users/files/waniz.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec417feeb92---duwalatizede.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bcbcb9af2fb---16197773285.pdfIn PDF document text
    • http://biolabsrl.org/userfiles/files/lobusujenilorarikejubupuz.pdfIn PDF document text
    • https://alatheir.com/atheirwsfiles/file/wawudamakutopapevuxuj.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/9m2kguuchr4k47v4pfm7f89t8e/gilifevekuzapafabafike.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/d4eb8356fc97f40aec92c020d91de300/lubonofukima.pdfIn PDF document text
    • https://plentis.eu/ckfinder/userfiles/files/36776401616.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b94002794b3---bulom.pdfIn PDF document text
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/s50d5jha822u44ngqt946g7el7/2283659932.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ae8e756fe94---43547767078.pdfIn PDF document text
    • https://doctornhospital.com/banglanews24/editorsfiles/files/xefides.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/160a6ae05864f0---nebizemaxuneweneroma.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=pitch+perfect+3+2017PDF link annotation
    • 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_off0000cb81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB81 17552 bytes
SHA-256: 5f2f95fdf9df92631ebb58d0a7b387aeef8e2b3887772b3f0f959d31cfc572dd
font_01_sfnt_off0000e60e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE60E 4028 bytes
SHA-256: 685c6255667da597e07463aeb60152a6caaa9192a95d97d7a31680c69eca8f58
font_02_sfnt_off0000f4cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4CF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00010ce6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CE6 10496 bytes
SHA-256: abcb977b26d876f18a584061624c7765eca8d2169073aeb9d1a45f166ebef5bb
font_04_sfnt_off00012509.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12509 18912 bytes
SHA-256: d57647f82dc23909f5a8a2d5a6968df59ed348ac174906b47a97b0465c9d2dc8

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