Malicious PDF — malware analysis report

Static analysis result for SHA-256 29ac323143bda408…

MALICIOUS

PDF

93.7 KB Created: 2021-09-07 07:05:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: fe982173d8f2de84ae985b2c36b32756 SHA-1: e60bc1fe0ac58da749cbdcc51ea92d5abdf6d800 SHA-256: 29ac323143bda408cb85210e87a5dcaf664df95d3db929bb53ebe3787d4bb1c7
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of external links, many of which point to disposable hosting or compromised CMS upload directories, indicating a link farm designed for malicious redirection. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a phishing or malware distribution intent. No scripts were extracted, but the structure suggests it's intended to lure users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3592

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://queure.ru/uplcv?utm_term=micro+milling+machine+pdf PDF link annotation
    • http://dxqzx.com/ckfinder/userfiles/files/20210830_054158.pdfIn PDF document text
    • http://fitnessklub-impuls.pl/uploads/assets/file/45740674420.pdfIn PDF document text
    • http://hoaisonland.vn/upload/files/98135269669.pdfIn PDF document text
    • https://shian-jin.com/UserFiles/files/14908185296.pdfIn PDF document text
    • https://krassimirtaskov.com/userfiles/files/50830197090.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/a0317af4d4edaa737381702337652ece/limebenufiminenogeberapag.pdfIn PDF document text
    • http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/foxavuzijituzuripogakiva.pdfIn PDF document text
    • http://royalwedding.jp/images/blog//file/71667676698.pdfIn PDF document text
    • https://clubforeducation.com/FCKeditor/userfiles/file/misajivatelok.pdfIn PDF document text
    • http://ranjitabiswas.com/userfiles/files/xujozibajajolenewer.pdfIn PDF document text
    • http://mt-filtration.com/uploaded/file/127911619160e33cd8a5a6a.pdfIn PDF document text
    • http://gptools.net/userfiles/file/buwogojipifimewiv.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083f41d4920b---47889603528.pdfIn PDF document text
    • http://lobi.md/userfiles/file/47846118277.pdfIn PDF document text
    • http://a1-automotivegroup.com/upload/files/gobosevo.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ff033fe2ac4---97347942115.pdfIn PDF document text
    • http://tcsm62.org/uploads/news/file/woneb.pdfIn PDF document text
    • http://edu-family72.ru/content/images/uploads/file/puxalukivakuvewatoteto.pdfIn PDF document text
    • https://tempatpasang.com/contents//files/xiduga.pdfIn PDF document text
    • http://xn--sanitrprofi-p8a.ch/fckeditor/editor/images/file/ponesurugo.pdfIn PDF document text
    • http://maekuangudomthara.com/ckfinder/userfiles/files/rupaxibixurirogowepalox.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/7f6d09508d2ddccf0d1c1f2ec96d296e/38027842184.pdfIn PDF document text
    • http://amongelite.com/ci/userfiles/files/91157888415.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012e1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E1E 18656 bytes
SHA-256: c70755415a0133049d5d8673ef04c8f230ac59b81ba1eacd93f2847b182a9cbf
font_01_sfnt_off00015f4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F4B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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