Malicious PDF — malware analysis report

Static analysis result for SHA-256 178fd70011cd5e61…

MALICIOUS

PDF

82.9 KB Created: 2021-07-17 02:58:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 395ed35d737f63a47831a7f7b5e26a42 SHA-1: af5a9e5505f854892d8588d224603dc3a477b920 SHA-256: 178fd70011cd5e616850367a71dad19c62d65b35358bea08be0a7d25c08b58b7
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised CMS uploads and disposable hosting, indicating an attempt to redirect users to malicious sites. The document body is unreadable, but the heuristics strongly suggest a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://softwarefactory.nl/images/file/7356798934.pdf In PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609202655aaf3---84001410775.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/cg97a8mh7hsf6a07qkrgnqbbm5/xofig.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a90386ad7b8---80858844119.pdfIn PDF document text
    • http://cnokorea.com/userfiles/file/lesuga.pdfIn PDF document text
    • http://wagnerpc.com/userfiles/files/tavegopexe.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c302dbe422b---pokuwasisekijalenibadap.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160b2dbeb90402---zekugaxano.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/48d3f9b205a7155897773e5847fec291/69716378794.pdfIn PDF document text
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/e91eb63a0d44cb2bdaa560695110dee5/bikuzabedesoluwi.pdfIn PDF document text
    • http://ttworld.hu/uploads/content_files/files/vesovobafotexojezobaviwuv.pdfIn PDF document text
    • http://xn--e1aaafipco3bk8gra3b.xn--p1ai/upload_picture/file/gexelosaxukujone.pdfIn PDF document text
    • http://quiltingacademy.info/fckeditor/userfiles/file/sabulisidan.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160df1c89a106a---lujowumogijapofofa.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d02eef42842---1211156432.pdfIn PDF document text
    • http://iccarrentals.com/files/file/wezusi.pdfIn PDF document text
    • http://ankamet.com/userfiles/file/kutawewemiji.pdfIn PDF document text
    • http://consoles-a-gagner.com/fckeditor/userfiles/file/lumoxevuxusokobodarer.pdfIn PDF document text
    • https://samarpanbharat.org/trila/userfiles/file/xawuwojekewi.pdfIn PDF document text
    • http://yuhenganquan.com/userfiles/file/20210525125735_122898142.pdfIn PDF document text
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/hom7cipapdhee6rokd0furrvvc/23228746504.pdfIn PDF document text
    • http://humanitool.ru/userfiles/file/13381272816.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b86f8a38616---1195647658.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087a92bc8793---dalemalorosavuxog.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160870e160cc61---26363108427.pdfIn PDF document text
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/t4svh7lor5gv4hsitm2erd2k7s/roras.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=tag+heuer+instruction+manualPDF 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_off0000e1d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1D5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f9ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9EC 10740 bytes
SHA-256: f7de33a20940d8a777dc08c5ec1f980cd78056e214f5e3275481311acb33a507
font_02_sfnt_off0001126e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1126E 16744 bytes
SHA-256: 9fa71dd26fd229d24b24a29006caccb4571f8afc03735d5b5d87b5a101a76fc9