Malicious PDF — malware analysis report

Static analysis result for SHA-256 f47066ad3aa96928…

MALICIOUS

PDF

87.1 KB Created: 2021-07-02 13:00:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fa4a69c6d7d0c707e35ceed159e784eb SHA-1: b530d090966d1d2a14fe3f10f5028e65563b0ee2 SHA-256: f47066ad3aa969288471ccc0a2235ddfb929f05307f8d03d74d4f6b3fbe17d92
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to websites hosted on compromised CMS platforms, indicating a link farm designed to distribute malicious content. ClamAV and ML classifiers strongly indicate malicious intent, specifically classifying it as a phishing trojan. The embedded URLs suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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://cayxaotamphan.net/userfiles/image/file/89490223830.pdf
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606db57951ef0---86681062568.pdf
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/f4550a7a7ad48b9478ea9483408a3a73/safitatuduvotogaled.pdf
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/a5ef25c84df68590e59ba2b2904758dd/75710301371.pdf
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe834e48a0---47344387675.pdf
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c524d2d2790---mabixugone.pdf
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609809179caa7---57288724734.pdf
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/94149b25eab6bbede1eb96f0c7b82225/jujidogoraz.pdf
    • http://banghaija.com/userfiles/file/segen.pdf
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608c78546aea4---wumifumu.pdf
    • https://iominneapolis.com/wp-content/plugins/super-forms/uploads/php/files/7cb26fff3a533533e514a781216ad616/19362577847.pdf
    • http://houselandia.ru/files/3873751281.pdf
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c0b5c9388d0---denosidapitatuf.pdf
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160968bc3da27e---mirajelugu.pdf
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c4275693ec5---16303888312.pdf
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/aca6e8e554b3444dc47ab15cf9a03132/gitanitosixuvezed.pdf
    • http://chnli.tw/CKEdit/upload/files/zavesolagupajerejeti.pdf
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/8f0557673ae549cd6b26f52cf4ff1036/52301778937.pdf
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/5a8d6d56155eb6cd8a31be20f55fa064/duwobukoriroxabatuma.pdf
    • https://ideylia.fr/uploads/file/90893672856.pdf
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a1f5fc2313c---20579231270.pdf
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093de67c3b2c---99038943019.pdf
    • http://ucinnovation.ru/admin/ckfinder/userfiles/files/75600300796.pdf
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e1b3473562---96187454273.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=let%27s+go+1+4th+edition+student+book+pdf+free+download
    • 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_off0000cac5.bin
2a97f13c47e8a6c99bdfd085f3c7f3ba857705fe1e55e811363b853079e5bedd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCAC5 27976 bytes
font_01_sfnt_off000103c0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103C0 16792 bytes
font_02_sfnt_off00011bd1.bin
808b792520d02da5561801184151ef5f05f0efdc8825c19698ea43c2aca68c2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11BD1 16236 bytes
font_03_sfnt_off000131bd.bin
e75ba02f38b3972595386a4c1c752fae995bf849ecaad7938bcf4a1dcc5cc55c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x131BD 11316 bytes

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