Malicious PDF — malware analysis report

Static analysis result for SHA-256 07944d134b9cc682…

MALICIOUS

PDF

92.1 KB Created: 2021-07-06 22:43:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f20194060b931c453a84352d87fd6875 SHA-1: 85caf5aa8e0b1402f196e1aa7b055d62484a1f1d SHA-256: 07944d134b9cc682c1c0a5d5851c8398b4a088a3afe357ad3dda907cb1edae8c
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript and a link farm pointing to multiple compromised websites, indicating an attempt to redirect users to malicious content. The presence of a PDF_JS heuristic firing and numerous external URIs, many hosted on disposable domains or compromised CMS uploads, strongly suggests a phishing or malware distribution lure. The ClamAV detection further confirms its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

Heuristics 8

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://flygarfield.net/userfiles/file/59463808789.pdf
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/fb44996b8e71e3d366b9ec5515c9eb2b/bijenejagibenelurari.pdf
    • http://www.dreamstoreonline.es/ckfinder/userfiles/files/79688091769.pdf
    • https://marosme.ro/hirek/file/69940782258.pdf
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607e42a675eb2---mutosifitipopinefoku.pdf
    • https://sfasg.jp/js/ckfinder/userfiles/files/60051647527.pdf
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/87764364460bb05c8a1368.pdf
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/jchr5aju6ifbj9q3kto6hs61kl/nipekovewelebole.pdf
    • http://ccswcd.com/userfiles/file/tisaleluxazelasimajis.pdf
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608588d0ec18c---64042856604.pdf
    • http://ytlcases.com/userfiles/file/tivavepiditinasigififatux.pdf
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac56d24ec76---buvovogeselutitobamibo.pdf
    • http://healthywithhart.com/res/file/61462565424.pdf
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a718467e5b9---25109599809.pdf
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b01902b2583---betuzosibipopilezulite.pdf
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/2po1e6d4h3ksu2tren2bg1q5qn/78685416870.pdf
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/dc17d16aa2bdfa869bcb76ccaed9c5f8/88557235954.pdf
    • http://dichvutheapec.com/upload/FCK/file/keredenuvebasa.pdf
    • http://ypperfect.com/ckfinder/userfiles/files/34554055553.pdf
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b53de658e2d---44905630262.pdf
    • http://opuspoint.com/ckfinder/userfiles/files/85770758673.pdf
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/fa7sppckq490p8v5tbuapmmrar/48115346005.pdf
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c8fc918bbb6---76713912579.pdf
    • http://sukhabalka.com/files/file/54093153715.pdf
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/160a3d803ac3f1---lisixubizedipul.pdf
    • http://liebherr-tr.com/userfiles/file/darezigupivub.pdf
    • http://md-servicios.com/userfiles/file/71329981878.pdf
    • http://sosonomo.com/ckfinder/userfiles/files/61657258243.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=lecture+notes+on+strategic+management
    • 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_off0001052c.bin
e82c04787b9aad96ec77caa0d040308e76b0c505fff4fad31683fcb710e078a6
pdf-font-stream PDF embedded font (sfnt) at offset 0x1052C 10584 bytes
font_01_sfnt_off00011d5d.bin
694b3796d0d664fa67283b7b70099a81362c840bbe320dd08e7e5d5849aa860c
pdf-font-stream PDF embedded font (sfnt) at offset 0x11D5D 17828 bytes
font_02_sfnt_off00014aa7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14AA7 16792 bytes