Malicious PDF — malware analysis report

Static analysis result for SHA-256 e14212f8f1ad00d4…

MALICIOUS

PDF

80.5 KB Created: 2021-09-17 10:36:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4145216a1b68ee003f08b2e25bdc346d SHA-1: bb077d80a1d6811a0a543c8209f4ea96ab783dfb SHA-256: e14212f8f1ad00d4d98dab2c3f656295183906e34704f8335cd047b6c9e51040
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript, which is often used to redirect users to malicious sites or download further payloads. The presence of numerous links pointing to potentially compromised or disposable hosting further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://biocoop.legreniervert.fr/ckfinder/userfiles/files/33557992849.pdf
    • https://afmiletisim.afmiletisimajansi.info/resimler/files/sulufelix.pdf
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1612f4d38b238a---kogederosa.pdf
    • http://uforoi.com/app/webroot/uploads/files/vagedijolaludevisoguzodow.pdf
    • https://perfecthospital.org/ckfinder/userfiles/files/xupudeg.pdf
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/16139edd5c62db---82506737137.pdf
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16138e937d7f7d---wuzoxesiwotefogoxuvagi.pdf
    • https://flomogroup.com/upload/files/menelomu.pdf
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613b6d5ab2c20---fibutafalibetejawozitit.pdf
    • https://distriparkbotlek.nl/userfiles/files/91380954622.pdf
    • https://totounited.com/contents/files/26153436556.pdf
    • http://autosvilar.com/uploads/ckfinder/files/75079186128.pdf
    • https://varbackaforskola.se/ckfinder/userfiles/files/binopimineniwegaga.pdf
    • http://uts.edu.co/portal/app/ckfinder/userfiles/files/lewuzugaremo.pdf
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/0777246ebd737ac7817257e41e99a4c5/99542462183.pdf
    • http://adabaskimerkezi.com/upload/file/40923548868.pdf
    • https://altaamir.ipixpms.com/Rapport/public/assets/ckfinder/userfiles/files/13405298151.pdf
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/161339bb417c51---xoguso.pdf
    • http://solarexperte.ch/fckeditor/editor/images/file/vudiranex.pdf
    • http://abpjseah.news-read.com/upload/files/59343264574.pdf
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130b08590cdd---zatulawipizorogu.pdf
    • https://empezo.xyz/js/ckfinder/userfiles/files/vudapuji.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=save+webpage+as+pdf+mac
    • 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_off0000d6e3.bin
27bd5eb8d5bb26c7f110e11e318c6ce1909ed5cc9ad5d2d826f75ff85cb94e72
pdf-font-stream PDF embedded font (sfnt) at offset 0xD6E3 10768 bytes
font_01_sfnt_off0000ef52.bin
c4faacd7e770fb55570bb88bd12cf254bd856e5e4914fe153042eb282360aec3
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF52 17328 bytes
font_02_sfnt_off00011c39.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C39 16792 bytes