Malicious PDF — malware analysis report

Static analysis result for SHA-256 f45f111c65dc70d4…

MALICIOUS

PDF

95.6 KB Created: 2021-07-27 18:54:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: d4fadd6f25bb892decd360425710a952 SHA-1: f2703caee5d5b98f79355d7a4f064dd8784d15a2 SHA-256: f45f111c65dc70d452cbcd7a200ac1ddbaf2c8b5a3ac64af8b78b8219eb81ee7
124 Risk Score

Malware Insights

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

The file was detected by ClamAV as a phishing trojan. Static analysis revealed it functions as a link farm, with numerous URLs pointing to PDFs hosted on compromised WordPress sites. These links likely lead to phishing pages or further malware downloads, indicating a malicious intent to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier clean score 0.2262

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 https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/6208ab8afa0110ce7964813bfbbb7dfd/rosutubuwabofojume.pdf In PDF document text
    • http://virus-safe-zone.com/ckupload/files/pedakegekirupewen.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/b8a05bc591a5a859ca0990586d902585/zuxewinujarepode.pdfIn PDF document text
    • https://masini-de-ambalat.ro/images/userfiles/76042783162.pdfIn PDF document text
    • https://pioneerlift.com/upfiles/editor/files/78493545898.pdfIn PDF document text
    • http://debseven.net/UserFiles/File/41530681313.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfaf949f987---97026708446.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608bdb6ca8dde---48361637948.pdfIn PDF document text
    • http://brilliantsolarpaneling.com/userfiles/file/98593399605.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160e578222ae12---66916984810.pdfIn PDF document text
    • http://wojno-stal.pl/pliki/file/35424361250.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/1jkq5s9phkj8p4gq6nsjalcni0/degotomip.pdfIn PDF document text
    • http://xn--b1agjlwjc3g.xn--p1ai/ckfinder/userfiles/files/lupomokurapanute.pdfIn PDF document text
    • http://itineraire-consulting.com/ckfinder/userfiles/files/61545567772.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec9c64a6c5e---43836448817.pdfIn PDF document text
    • https://propiedades.net/ckfinder/userfiles/files/tutusifuwipemek.pdfIn PDF document text
    • https://whitesal.com/data/images/file/6106_20210714010743.pdfIn PDF document text
    • http://jsushibrea.com/uploads/files/43052614331.pdfIn PDF document text
    • https://aljazeerahpetroleum.ae/userfiles/files/naxetisipubotuvufidel.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160854f59ce8ad---11013097196.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160b9d9dc0d02b---devavekejesujib.pdfIn PDF document text
    • https://dukra.sk/editor_uploads/files/jawagizipilozalosupemeza.pdfIn PDF document text
    • https://clumba-indoor.ru/files/files/29441702341.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/160a6c2dd7b2c8---bajoduridip.pdfIn PDF document text
    • http://hzbmsj.net/images/upload/File/26425051346.pdfIn PDF document text
    • http://bagiez.com/userfiles/file/kowonulaxo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=papa%27s+pizzeria+free+download+full+version+for+pcPDF 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
stream_006_off00013a24.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x13A24 17776 bytes
SHA-256: 9220e90b11878f86e8d6afb9342a49f222b29401c1e5b3375e163716e529c6f9
font_00_sfnt_off0000fc05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC05 3056 bytes
SHA-256: c0ba9a0a4086c4012c11eff66ca36c689fd1634c8a072165865f5683193fb250
font_01_sfnt_off000108ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108AE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000120c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120C5 10864 bytes
SHA-256: 709f83f342bd5a69f014c3ac719292e9156a0f672b2debcc4545995c0add9099
font_04_sfnt_off00015599.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15599 18304 bytes
SHA-256: 77c84811a3a5bf61ec9d9aca94e60df9c783cf46230d620378d05771e82a40b0

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