Malicious PDF — malware analysis report

Static analysis result for SHA-256 c49448404452d8cd…

MALICIOUS

PDF

138.3 KB Created: 2021-07-17 08:34:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 246deed8a9b93b672db24b4f04b0221d SHA-1: a8dcd66ec455ef204165c15a8be238927eb0034c SHA-256: c49448404452d8cdd82819c401f1a388cd31130893beb70e5a7c654f74350332
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest a phishing or malware distribution intent. The presence of multiple links on compromised CMS uploads and disposable hosting reinforces the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9708

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://agro-vostok.ru/userfiles/file/xebotufolowobe.pdf
    • http://africa-emergence2019.com/userfiles/file/kinabogokepazulewofapiruj.pdf
    • https://antae.be/app/webroot/uploads/file/vowokititisumemogebebul.pdf
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f25f1afa55---5637501713.pdf
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bfdb6e4cc1---zumevelevi.pdf
    • http://d4sontario.org/clients/e/ed/ed023a0734c265ca673a92d1d81de675/File/32531706472.pdf
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160c4a1ad3ba97---32199247583.pdf
    • https://anmimar.com/royal/userfiles/file/kugijopumixeva.pdf
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bd951603a5---fexok.pdf
    • http://www.specemc.ru/upload/files/77923749542.pdf
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/78f0ff1d9a03190b840f3a85c2f01c32/botasadod.pdf
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/ae19fea86c6e9d0656aa9b27f2ac0dd7/zadavuluxuvufisexuneze.pdf
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/2849edf8901fb6d55a07a467c2ca8aa6/xabovawajexu.pdf
    • https://datajournonepal.org/files/vujozidoxiwarogofekav.pdf
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160d197f251060---norulutalim.pdf
    • https://bbpartner.cz/userfiles/file/76724776924.pdf
    • http://cs-web-design.de/ablage/userfiles/files/xozuwo.pdf
    • http://perlawarmii.pl/userfiles/file/risakesegajovit.pdf
    • https://activepymes.com/pub/file/12365121324.pdf
    • https://alternativecarrepair.com/userfiles/file/sexodigix.pdf
    • http://wsp.pl/userfiles/file/49045095121.pdf
    • http://www.apsetedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160741adbbc1f8---lujemap.pdf
    • https://islandsvefir.is/wp-content/plugins/super-forms/uploads/php/files/m46jnhfnsedirvjv7edpjferjg/gubuware.pdf
    • https://cornwallstaffagency.com/userfiles/file/zuruxusipodikegizowax.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=praise+him+with+the+timbrel
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00019a44.bin
d15231bf774209387ad4ce822a9df91bedcf488b23067af078fe42583f505a80
pdf-font-stream PDF embedded font (sfnt) at offset 0x19A44 20080 bytes
font_01_sfnt_off0001cbee.bin
082318540803a546a89355f85a0b3e7e7ff66f0fb33c19b1167cdae36d08368b
pdf-font-stream PDF embedded font (sfnt) at offset 0x1CBEE 10376 bytes
font_02_sfnt_off0001e36e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1E36E 16792 bytes
font_03_sfnt_off0001fb7f.bin
155d2e02a373bfe900b66a43548ee7d1466cccc57e9f3777d92e69528f4aa675
pdf-font-stream PDF embedded font (sfnt) at offset 0x1FB7F 19104 bytes