Malicious PDF — malware analysis report

Static analysis result for SHA-256 c64e04b9a0912a1d…

MALICIOUS

PDF

89.5 KB Created: 2021-07-21 18:01:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 98a158f9afe929cae3f10fa31975a925 SHA-1: 4efaceb60a0edc96a9e37062b681bd5261754de1 SHA-256: c64e04b9a0912a1d6389a70c6f9e98333e5b79fffa61df2e10b1c7a3d12d20c5
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS upload directories. These links likely lead to further malicious content or phishing pages, aiming to trick users into downloading malware or revealing sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160ba9bcd035cf---96604757225.pdf
    • https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3c577fa36---15142498260.pdf
    • http://hgbs.de/userfiles/file/sidubujesojotifizu.pdf
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160beccf258084---dubidewiz.pdf
    • http://broadmoor77.com/clients/39738/File/dubuzubawapitavozovozige.pdf
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/ubsdom5lvbgeoo4br259qas2nb/83676840952.pdf
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d7dc12a12a6b6fca45b1d12974b2d5d8/magutato.pdf
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/e17dd3098c1799233cc1acf09179bdd7/nujupodasituje.pdf
    • http://fertilityupdates.com/userfiles/files/5288083457.pdf
    • http://emotionpicturesfestival.gr/userfiles/file/taxakopapezukorolov.pdf
    • http://gachtrangtritranvinhtin.com/gachtrangtritranvinhtin/Images_upload/files/18403866522.pdf
    • http://okwmd.com/upload/fckeditor/file/gakowobu.pdf
    • http://sieuthibongda.net/ckfinder/userfiles/files/99178001067.pdf
    • https://radmangroup-ye.com/rgfiles/file/waxorazovek.pdf
    • http://idcla.net/upload/files/35168900917.pdf
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1608045f058172---66927869509.pdf
    • http://perrymanreunion.com/clients/f/f8/f8644f0eb9578147d5589f75b8c3e300/File/nunabaped.pdf
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/qlgvc40d4kvp8dss3nu3mq98uo/86839696584.pdf
    • https://bikeid.net/ckfinder/userfiles/files/63271357812.pdf
    • https://www.playitdirect.ca/ckfinder/uploadfiles/files/33193478079.pdf
    • http://hagelkonzept.de/userfiles/file/bojuxiwotonunuwumu.pdf
    • http://westboroughhigh76.com/clients/b/bc/bc4984db1d461a603911d7e4814e3e59/File/70771153324.pdf
    • http://55pluscommunityspecialist.com/userfiles/files/wisuposijafemeku.pdf
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/1ebadb21dc57c0415fec452e0644eb3a/vamitududinitoketevape.pdf
    • https://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16086c945a3240---20274655064.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=bloating+causing+shortness+of+breath
    • 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_off0000f964.bin
3c7e79e8dec80fdacf04ddae1333d26da6184624f267ffe6d4d062cf40020cbe
pdf-font-stream PDF embedded font (sfnt) at offset 0xF964 10908 bytes
font_01_sfnt_off000112a0.bin
a24d3a65c23c00ede7324bdf54a7efc0a2ab420ba37971aa5e2f0b4312e21af5
pdf-font-stream PDF embedded font (sfnt) at offset 0x112A0 17408 bytes
font_02_sfnt_off00014030.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14030 16792 bytes