Malicious PDF — malware analysis report

Static analysis result for SHA-256 d454d204d2c8e21f…

MALICIOUS

PDF

77.2 KB Created: 2021-09-16 10:15:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 99cf38e9d883d0e14a20cede217fac21 SHA-1: a94647d26cba74a33a45c608293b4283f3afd11c SHA-256: d454d204d2c8e21f965c5dce56238a08ca7022539619b66635f550e68538719a
134 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple external URIs, indicating it's designed to redirect users to other malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The presence of a link farm on disposable hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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
  • 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 http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16142e2ac5e83a---94652345469.pdf In PDF document text
    • http://www.jacenter.org/js/ckfinder/userfiles/files/72355397333.pdfIn PDF document text
    • https://path.mn/userfiles/files/12980800513.pdfIn PDF document text
    • http://iltorg.ru/upload/file/warugugaxuwinedagivuzut.pdfIn PDF document text
    • http://kfbma.org/files/fck/file/bifuvotekasidukubudar.pdfIn PDF document text
    • https://beautydent.hu/editor_up/66812680974.pdfIn PDF document text
    • http://www.morrisjones.co.uk/EditorImages/file/pikugowepopo.pdfIn PDF document text
    • http://avision-italia.com/userfiles/files/kerore.pdfIn PDF document text
    • https://himarco.ir/basefile/himarcoir/files/61349658549.pdfIn PDF document text
    • https://underworldgear.com/upload/users/files/wuwuvanuzekufogitunu.pdfIn PDF document text
    • http://simoncaulkin.com/images/sozikutewoga.pdfIn PDF document text
    • http://webmba.fr/client/logo/file/24679928355.pdfIn PDF document text
    • http://neo-net.info/giganet/files/file/93010085151.pdfIn PDF document text
    • http://xn--4k0b43gkwo4gn.com/upload/editor/file/makadasogaruwejadexi.pdfIn PDF document text
    • https://armour-technoz-ca.otzol.net/ckfinder/userfiles/files/25226455993.pdfIn PDF document text
    • http://innobiztour.com/FileData/ckfinder/files/20210903_3C6E1E2E58BB5BDF.pdfIn PDF document text
    • http://mopi.eu/ckfinder/userfiles/files/19023714716.pdfIn PDF document text
    • https://ngaa.org.au/application/third_party/ckfinder/userfiles/files/85464575304.pdfIn PDF document text
    • https://labelmarket.eu/data/file/68783856366.pdfIn PDF document text
    • https://fond.ru/userfiles/file/vizedizokezotakarisedu.pdfIn PDF document text
    • https://alajuusa.ee/media/contents/file/jasigutowefugakoduwipowu.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/emimitazizeluzin.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=the+rate+of+change+of+displacement+with+time+is+calledPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000caa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAA9 16504 bytes
SHA-256: dcf816e8ce55599feea96bad1ff67f8814f8027b9fbf0f783eeb6d53db2fb7df
font_01_sfnt_off0000f546.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF546 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010d5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D5D 11116 bytes
SHA-256: 0c7c4d35c449f1ec4b21cfb87fb229b4a9d0456baa76a483a10d5e347ff38a57

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