Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea6ed7bf6f97933a…

MALICIOUS

PDF

93.4 KB Created: 2021-09-03 07:47:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 7b8f740a0d843dd7632c734b6889dd07 SHA-1: c6f760fe9c8ae80b383c671dd0d6ac7fb3e0abfa SHA-256: ea6ed7bf6f97933a8b07dff9b41a8c87b6ea0d2ca709c203ba4101e3f25cf40f
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm pointing to numerous URLs, many hosted on compromised WordPress sites, suggesting a phishing or malware distribution campaign. The presence of external URIs and link farm heuristics indicates an attempt to redirect the user to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://medvor.ru/uplcv?utm_term=hindu+newspaper+today+in+english+pdf+free+download PDF link annotation
    • http://sumtinathholidays.com/admin/uploadfiles/file/61534562407.pdfIn PDF document text
    • http://area100impianti.it/userfiles/files/53086647436.pdfIn PDF document text
    • https://study4student.com/cache/fck_files/file/dadum.pdfIn PDF document text
    • http://tevukasveza.lt/ckfinder/userfiles/files/3558773370.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606d91eeea9c1---kedopuxaneferokujaremowu.pdfIn PDF document text
    • http://gaytonfa.com/upload/files/18262512058.pdfIn PDF document text
    • https://edinburghpools.com/contents//files/19832875139.pdfIn PDF document text
    • https://whitesal.com/data/images/file/7464_20210517211308.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/0fa2d0b185731ab5822e4740b6438346/lebawepakizuluzakid.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/ee222d621886d8f420b95ffdf7bdbc42/1056923238.pdfIn PDF document text
    • http://madinaboys.com/easydo%20v2.00/files/uploads/tusonabepewurulo.pdfIn PDF document text
    • https://xn--p3t29jo1ed4o4xw.tw/upload/files/fepugewakefob.pdfIn PDF document text
    • http://stratford1980.com/clients/1/19/19838be1bbe5684469623718d5e25b5d/File/57976570194.pdfIn PDF document text
    • http://sweetbasketsbyjackie.com/clients/864293/File/51733971135.pdfIn PDF document text
    • https://bloomland.com/sites/bloomland.com/files/84152729984.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16085b0a420545---93680429735.pdfIn PDF document text
    • http://okfilm.kr/userData/board/file/kovubikefeli.pdfIn PDF document text
    • https://oteaexpert.fr/cite_imgs/file/fizevodozusavatovanumu.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1838549f81---98974084113.pdfIn PDF document text
    • http://pantryscan.com/123cars/imagefck/file/xupavanilogixesiropotomof.pdfIn PDF document text
    • http://deforma.it/userfiles/files/jovutiben.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612c21c55d96e---78970909057.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d9e255d5451---xezivatozo.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/f26f96b4601a465bdbe83266e3252465/95517848530.pdfIn PDF document text
    • 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_off00010529.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10529 18944 bytes
SHA-256: ddf4745118cc62d1a234000bfab4eed02a5598ee87b74e445b40a5b6c955404f
font_01_sfnt_off0001366f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1366F 11068 bytes
SHA-256: 2d5b669c888b6590552583f7417cbb2a030a1351659cd3c846e24a6a1ccb8464
font_02_sfnt_off00014ffa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FFA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1