Malicious PDF — malware analysis report

Static analysis result for SHA-256 c018c46e33571cae…

MALICIOUS

PDF

86.5 KB Created: 2021-07-03 12:19:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5114b8cb4d3c7a89cfd7dda0046b9aa4 SHA-1: cc2e55e15e42ea8981ee0896f342acb904e80b59 SHA-256: c018c46e33571cae1c8b8c7937cdee55fca4c97e35fe87334667da7327627d98
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to compromised WordPress sites and disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL analysis point to a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16084d8c36b9b8---xewafefisul.pdf
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/3q9ip3rt0m78nnfmeftoc9sqk6/widabenasarudi.pdf
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf51c77ed7---bevosivifevobe.pdf
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a7baf9093bd---63598525419.pdf
    • https://aimara-bg.com/userfiles/file/zanad.pdf
    • http://taiwanglassgroup.cn/userfiles/file/vevagoki.pdf
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c499086db95---26201076884.pdf
    • http://centronegozi.com/public/6351106965.pdf
    • http://firewheels.pe/userfiles/file/34772792880.pdf
    • https://kawanmto.com/contents//files/65417525160.pdf
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/0c1e338c50be88383047cc82de097e2e/96391429640.pdf
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/160c1971a45c3b---bamevesevarifenidi.pdf
    • https://jackyrouxmethode.com/userfiles/file/13762341081.pdf
    • http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/8perm74op309qrtqk0kilgvs40/galewibutepimopu.pdf
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/c392e531eaf7163de459f24accf1926c/pazojamunopetujo.pdf
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606efa9021f04---zexofujepulosevizefeteso.pdf
    • https://aslimitada.com/userfiles/file/gunisirosubaxugevulu.pdf
    • http://akicgiyim.com/userfiles/file/wowevitawatejir.pdf
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd6edd6553---dedekitipomelevuvominosal.pdf
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b08332a857d---96091453919.pdf
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/tp3pde70d9p1b7dc2qcl6p8if3/fufopufubizilebivopulezir.pdf
    • http://colegiosantarosa.com/uploads/imagem/file/pemozalonenowezoroke.pdf
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608c86e1ad778---mugurumuwezobe.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=logo+quiz+ultimate+cars+answers
    • 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_off0000e3f9.bin
7dfe1bf1fccbd324cb5473ecafd432eabca3365c65894e46cb9c92675d86fdf0
pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F9 10920 bytes
font_01_sfnt_off0000fd04.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD04 16792 bytes
font_02_sfnt_off00011516.bin
e2f3bda3c017bfd59471b067ec177e4e1a9d17426507fd752dd95f3dcebc725f
pdf-font-stream PDF embedded font (sfnt) at offset 0x11516 21876 bytes