Malicious PDF — malware analysis report

Static analysis result for SHA-256 58584f96959ff823…

MALICIOUS

PDF

100.2 KB Created: 2021-08-11 03:51:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: feba0e0f9092df9e38454a967c3f65d5 SHA-1: 44e8fbe26b105cc65a5ed089e15d09ae2c3550a3 SHA-256: 58584f96959ff823090ca3d8d8c2e5b4041126d6a21a5c40ceacba14f1c19b0e
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 redirect users to malicious content. ClamAV detection and ML classification strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, and the document body was unreadable, so the attack pattern is inferred from the URL heuristics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/bra7vuucihrfiuc2lbo686ljsj/fopajixodumolopipogimem.pdf
    • http://loveforlungs.com/clients/a/a9/a9a80f3a93b7553e0860ec1960497db0/File/losalujal.pdf
    • https://chongtham68.com/app/webroot/uploads/files/zajuxivof.pdf
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/fjbinj3c8uh5ks91llg41jf26u/68801159731.pdf
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1610ec49c0aac6---dilabumak.pdf
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/f4f86c5a080c3db306b1a23f6b6e8d50/28308940245.pdf
    • http://akkoryazilim.com/userfiles/file/36251104383.pdf
    • https://deepex.hu/hirek/files/dafadawazikomokimuwawaxek.pdf
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/sngmhjiajkg1h9dj9von4it4r6/16377457643.pdf
    • http://andrelandberg.com/userfiles/file/52784896547.pdf
    • http://lukasikgroup.pl/Image/files/48099555353.pdf
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160bc0515a181d---rusetakutisenuxaxas.pdf
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce39475637---mugupum.pdf
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160fbafba4552a---96352779636.pdf
    • http://www.accessibilite-salle-eau.com/ckfinder/userfiles/files/zabalel.pdf
    • http://dhs1970.com/clients/9/98/98bceae81adeaace0f0761aa7b0d12fa/File/tesuzet.pdf
    • http://cphs1970.net/clients/877309/File/27102424047.pdf
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160793f05231d2---jipuzovupapuxetorovin.pdf
    • https://bazab.ru/ckfinder/userfiles/files/78455575472.pdf
    • http://polkovnik.su/upload/file/38183704300.pdf
    • http://studiopassarotti.it/userfiles/files/zakitoz.pdf
    • https://n-v-v.dk/userfiles/file/dulurotuwadutiboxi.pdf
    • https://behagi.eus/files/galeria/files/41745678401.pdf
    • http://coalcreekcentenary.com/clients/5/52/52f735e63eff8706e1a2a73a20aef632/File/55157682559.pdf
    • http://american-security-inc.com/assets/ckfinder/userfiles/files/ditimukinusifakuve.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=milan+kundera+la+insoportable+levedad+del+ser+rese%C3%B1a
    • 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_off00011ff6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11FF6 16792 bytes
font_01_sfnt_off0001380d.bin
e60fefc3e259c3f81736a58feab5810292b232fecd2f6ea739500eca7ad2cac7
pdf-font-stream PDF embedded font (sfnt) at offset 0x1380D 10980 bytes
font_02_sfnt_off00015128.bin
555d11d36ddd7830640d345b8dd608071ef968e38863a06ebab8e273b3596cf3
pdf-font-stream PDF embedded font (sfnt) at offset 0x15128 18564 bytes