Malicious PDF — malware analysis report

Static analysis result for SHA-256 1162d022856abe1f…

MALICIOUS

PDF

72.9 KB Created: 2021-09-27 10:16:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 67ecaac9317ec8fc771ac3e285d136ab SHA-1: e1300b0f627148702a30e1129d067c5e6ee9eb68 SHA-256: 1162d022856abe1f880e4dc955f6d603da1a9895df2bbae643b36e37649a2b55
156 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to lure users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 https://lescourailleurs.com/upload/editor/file/46624969509.pdf
    • https://zippy-inc.com/app/webroot/userfiles/files/ronefuxiwobadizivagugotod.pdf
    • http://oodow.cn/upload/file/21092701224132243092bh2amg42m4.pdf
    • http://ch-bovi.com/upload/files/nosaj.pdf
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16148514ad9224---xozuxakesolomusorixaza.pdf
    • https://eatorhours.org/e-bussiness/fckimages/file/gepumotaxek.pdf
    • https://alariel.be/userfiles/file/28402310801.pdf
    • http://www.skk.com.hk/admin/ckfinder/userfiles/files/5864207307.pdf
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16130dc99ac017---93775417971.pdf
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614f07c18e6a6---vazanelivuretebikes.pdf
    • https://liho.cz/UserFiles/File/7708176116.pdf
    • https://transilvaniafishing.ro/app/webroot/files/userfiles/files/7597633113.pdf
    • http://hwangtosidae.com/userData/ebizro_board/file/95699894639.pdf
    • https://mediaskills.rs/files/79297235047.pdf
    • http://clubselectionvoyages.com/images/file/gikido.pdf
    • https://altaamir.ipixpms.com/Rapport/public/assets/ckfinder/userfiles/files/karuviduxizinumopalisovij.pdf
    • http://mid-europe-ex.com/images/blog/file/xeketuwutibisebufapojelu.pdf
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161401e60d7850---jizomibelabaxifisexil.pdf
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/7128976a60b908eebd82d21c55f04305/didekonipojirawugefa.pdf
    • https://nyirfa.hu/uploads/files/tobipuj.pdf
    • http://www.awakohchang.com/image/upload/File/1944114838.pdf
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613b2781597bb---39383716635.pdf
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/02c8f5f5e3c67507bed8db10fc722391/riwatisupafedovutaz.pdf
    • https://datawire.gr/files/files/rawegaxaf.pdf
    • https://accu-split.com/userfiles/files/jesipomapawevomezorupage.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=torch+brightness+android
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b59a.bin
813b5edc7ea7f34873d97d56ca7c2ef2e878617054f9306cfa97c88c1beea983
pdf-font-stream PDF embedded font (sfnt) at offset 0xB59A 10708 bytes
font_01_sfnt_off0000cdea.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCDEA 16792 bytes
font_02_sfnt_off0000e5fc.bin
c3c342fc5468b1833aebb6348d1bcdaf7fc019e2617fd293f1bb5c56185d03a6
pdf-font-stream PDF embedded font (sfnt) at offset 0xE5FC 19248 bytes