Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc41738c0d97d33c…

MALICIOUS

PDF

85.2 KB Created: 2021-08-23 12:57:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e08b295dab73baf34816e561c6d8da40 SHA-1: efc9b5de19c8ae5cb6420d9c82018cf9e16f0140 SHA-256: cc41738c0d97d33c4f1b1c8f54e23ae95419b47f35c23afa2a669af263f46935
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS upload directories, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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 http://montazerangroup.com/uploader/file/rasafupevukuwamafeku.pdf
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/84f0fb17467d4a8fe42b789e8212d058/tezafumigubod.pdf
    • http://goghepcacloai.com/media/ftp/file/wikoxapijakegepenulener.pdf
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607ffd16d8288---debivofef.pdf
    • https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/d94f2209b656730e4345f4323bd74b24/jefoveguzipawowuwu.pdf
    • http://dush-kz.ru/uploads/fck/file/devumetisos.pdf
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a166bdc2715---fewisub.pdf
    • https://craft-personal.de/userfiles/file/31964743601.pdf
    • https://alice-immo.com/userfiles/file/60905390926.pdf
    • http://sure2trips.com/bot/ckfinder/uf/files/41442787191.pdf
    • https://hbphoto.ca/resimler/files/8688373249.pdf
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/4f5c91a89a0cf7810e04535e58b29fc3/koketesupogijib.pdf
    • http://mashhadgardi724.ir/basefile/mashhadgardi724/files/towenaxoseparave.pdf
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/252i6sj28ve2ocjbsuarbia95s/17099555034.pdf
    • http://arohitourandtravels.com/userfiles/file/nozegonotes.pdf
    • http://duythuc-bearing.vn/uploads/userfiles/file/pisoropubepisagezonerip.pdf
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/160788a8930f60---zemuvasumeg.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/e1c6df5801e81b969fb7201f5bdba9c4/47232333882.pdf
    • http://bidmitt.com/img/files/file/6281979390.pdf
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/4bagd6ht00bups3o7q4pthbq68/89797584025.pdf
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/qpanoktn41l20p65bu4cabvej5/46877134301.pdf
    • https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/6e4aa17678184dd0da8e5f7790dc3c1e/pilav.pdf
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1609661618dc15---76110616980.pdf
    • http://ineke-ott.nl/keramiek-beelden-imagesfile/18432701154.pdf
    • http://natproperty.com/userfiles/files/25347608347.pdf
    • https://abcoegypt.com/userfiles/files/9227077170.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=what+is+the+meaning+of+cotillion
    • 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_off0000ea8d.bin
9d8b80421591114588d613d423652ba28b234601429629d9f67116d4e493512a
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA8D 16672 bytes
font_01_sfnt_off0001155e.bin
5cdeb1129e167c18765061371205da1592b080e172ace658ca000c2356173799
pdf-font-stream PDF embedded font (sfnt) at offset 0x1155E 10676 bytes
font_02_sfnt_off00012db7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12DB7 16792 bytes