Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c77df1e4577a14c…

MALICIOUS

PDF

81.4 KB Created: 2021-06-25 18:24:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9c9b035941ef0287dcc7ee33022c7f84 SHA-1: 8437f50d8786522e63667cd33945df8bb4f4e727 SHA-256: 6c77df1e4577a14c3d292a40a33cfe6cf3202345adc4cca3708d55048d7680cf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites, suggesting a phishing or malware distribution scheme. The presence of PDF link farm heuristics further supports this, indicating the document is designed to redirect users to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/c63fd97349a545ac1191a0a498b75059/61109384713.pdf
    • http://brlairport.com/images/file/65671348631.pdf
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608fedd6e3d3c---pekoniguresasozisub.pdf
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4e9515137f---nujuxuwixusovo.pdf
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/bl36tutogc43c6oak0rrdj322k/nasojugifevigonerewi.pdf
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d00c4b8e73---mefifenivonerewiniwawi.pdf
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160b911da0dd98---faxewulit.pdf
    • http://zatacorp.com/upload/files/87863034860.pdf
    • http://adance0112.com/upfile/editor/file/79273076828.pdf
    • http://www.tobywells.org/media/fckdir/file/zuwilusalube.pdf
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7a29ae1d1c---lurop.pdf
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/2dec2f0afea3bbba81ce004f4d98c429/vawovigapab.pdf
    • https://divinesacredshakti.com/wp-content/plugins/super-forms/uploads/php/files/cca79ca8b68359bf0750c24e9bf2b40b/sajelofo.pdf
    • http://mea-travel.pl/userfiles/file/80054518077.pdf
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16070502107db2---51421612853.pdf
    • http://iamsong.vn/uploads/files/goxewerefexenimimufeso.pdf
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/9nb3d48qnb7pjpjbgu0bq2llj6/70034163641.pdf
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a9a9441c690---30233450679.pdf
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/0q7u7upgh20kpcnprkc8or33mt/35566433545.pdf
    • http://shannonlakeestates.org/fck_images/file/xolufobawu.pdf
    • https://alexandrapanayotou.com/web/images/static/file/zitarukobutazidomixor.pdf
    • https://accesoriosalmayor.com/images/userfiles/file/dobumupipulotized.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16080dc4544234---36742753818.pdf
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a789761e8fe---64405640711.pdf
    • http://broadgatecapital.com/userfiles/file/mutuvokigodava.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=dungeons+and+dragons+out+of+the+abyss+pdf
    • 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_off0000d5fc.bin
a6dd9a995a7fc0596bfa228dda82204ad5cc4fd6a1f7048d994c99291ee501ea
pdf-font-stream PDF embedded font (sfnt) at offset 0xD5FC 19304 bytes
font_01_sfnt_off000106d2.bin
749c3d6bbf1b675c64d15f00ca4307bc3f01519c15d5f809a9ca31814331ffeb
pdf-font-stream PDF embedded font (sfnt) at offset 0x106D2 10996 bytes
font_02_sfnt_off00011ff2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11FF2 16792 bytes