Malicious PDF — malware analysis report

Static analysis result for SHA-256 76bba95f50bb65fa…

MALICIOUS

PDF

70.7 KB Created: 2021-06-26 14:18:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 6f94c93e9f92b8fe0266eb9636e149e9 SHA-1: e15c65eea25910b00e0dc1f0576d6ad143d48865 SHA-256: 76bba95f50bb65fa92c6866053229b953995a6f10c5a60a48165a5f518c5d55c
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised websites, indicating an attempt to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. The presence of external URIs and link farms points towards an exploitation for client execution, potentially as part of a spearphishing attachment campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://travellightnepal.com/userfiles/file/wulekojubawajazetakope.pdf In PDF document text
    • http://goraku-sangyo.com/userfiles/file/86827358941.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c04bda6476c---94160941993.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1608101e7826b5---19486337857.pdfIn PDF document text
    • http://annandale1963.com/clients/69704/File/pesidanamafizo.pdfIn PDF document text
    • http://woodwork.pl/ubezpiecz/obrazy/file/18384914217.pdfIn PDF document text
    • http://t-p-fortune.com/userfiles/file/25527071037.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/5hhidqa61fmd7p2f97vnhjsmp4/39943822228.pdfIn PDF document text
    • http://mountcalvary76.com/clients/9/90/9062e1c9f2360b2cedac6e2854879500/File/29040361862.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/b8a3d83f4e484abcdcc31303395c37f4/buregenexep.pdfIn PDF document text
    • http://www.darvidproperty.com/news/file/25174095501.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/619bf6769a794783b316453197be1386/rediso.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ae8e61b27f9---godiwum.pdfIn PDF document text
    • http://geoplan.su/userfiles/file/xupofivanijukab.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/58c2b8b924559b724b65cbf4c19b766f/potine.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a38265aaf70---32542166188.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/6lt64r1rc5pp531rmb30qeft2i/15858098204.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/pafedexeluvor.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160baf8fdc3326---lugijiwetobuwesur.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0fd38ce320---57753074160.pdfIn PDF document text
    • http://atdawnwelift.com/userfiles/file/tulema.pdfIn PDF document text
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5c1a3e77a7---43729812376.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4b26fb8173---wikobofonesigukozari.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/a3f30721b18e4f049a382213e3d8d257/lusosezupepolu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=life+without+educationPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b7a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7A8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cfbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFBF 10400 bytes
SHA-256: b472ebe0c4f3f2e51990125ef2dd633b918663a7c9fc7d3e2300ac8f9aa25d83
font_02_sfnt_off0000e748.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE748 15064 bytes
SHA-256: 02f6a32b7b8b26c61e53018f4dd5181726dcfafcb882c47c3dc9921437f2ca32

Open this report in the interactive analyzer, or submit your own file for analysis.