Malicious PDF — malware analysis report

Static analysis result for SHA-256 7897eee887eead31…

MALICIOUS

PDF

101.9 KB Created: 2021-07-17 21:41:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 2e30e460acf0902fb426c52c9d8a8145 SHA-1: 770a30ad77a4dc15c6a0704260a3a3c08d449679 SHA-256: 7897eee887eead31f3187c7ab39b67409db7574e96345dd9abfa511d3b128b49
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating it is a phishing trojan. It contains numerous links pointing to compromised CMS uploads and disposable hosting, likely serving as a lure to download further malicious content. While no scripts were explicitly extracted, the PDF structure and URI heuristics suggest an attempt to redirect users to malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9938

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://asthasupermarket.com/userfiles/file/kanikonubumo.pdf In PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/cfaa06qmt8t7p6er0i78t7e6ia/lizodejubivutuwemer.pdfIn PDF document text
    • http://schokobrunnen.com/idata/wararenewevamavural.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/3c1191b7f7ecf55e3936d3567e1c52ff/45909856338.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/8c4ba125b9236c38bfa275381fd4d4bf/jubofugutojugujado.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083f913a4d9a---mefapizisubenerobopom.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/63da2551a975b2de3b882655337fd585/wojufeno.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a9acf8467eb---nameza.pdfIn PDF document text
    • http://huucodatlanh.com/userfiles/file/gekedakotivetut.pdfIn PDF document text
    • http://jpmoto.biz/upload_picture/40903707390.pdfIn PDF document text
    • http://innova-perila.ru/upload/files/wabekawaxopivitemina.pdfIn PDF document text
    • http://fhs76reunion.com/clients/0/00/009202203981f132fd14d012a57c0fe5/File/rapaserotesiwevodavazon.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607c55c3c206d---29808362636.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/5rne0cqmuh0o4t2ukt0em6os02/lukawoxaze.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/j0ps9unnnkv4ritm8llhg6bv96/65408247371.pdfIn PDF document text
    • http://157.230.241.115/image/upload/File/pozuzizemaguvugu.pdfPDF link annotation
    • https://telenovella-bg.com/files/pizabamebetowomotupe.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606da6207e6f1---gotez.pdfIn PDF document text
    • http://muzeumostrowiec.pl/obrazy/file/29514898785.pdfIn PDF document text
    • https://gonguyenkhoi.vn/upload/files/nekojokaxevoniwizilobuxe.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16080d71c25860---45213371958.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3d4a2e994c---48219175875.pdfIn PDF document text
    • http://animalscipublisher.com/files/upfiles/file/bafobevof.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=the+world%27s+hardest+game+video+gamePDF 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_off00012b60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B60 17592 bytes
SHA-256: e744ccbd1cfaac348d3d30df6952749912f737b2d7bce9064678d968cec35198
font_01_sfnt_off0001599e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1599E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000171b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x171B5 10740 bytes
SHA-256: 97676bfb32cdd5ca9409243b578d1d23f9af0b4150fd8d23eadda2af04b5c0b4