Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a99172b15b73ff5…

MALICIOUS

PDF

74.5 KB Created: 2021-06-10 02:42:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 69f45a91712b604d989e2ed76cf33054 SHA-1: c580da9faf4ad8bc1e255227552883bf1504b99d SHA-256: 9a99172b15b73ff5f9a94a269bd6ab6fdebe453af136269579531ff3d2c9792b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous links to external websites, many of which are hosted on compromised WordPress sites, suggesting a link farm or phishing lure. The presence of external URIs and the overall structure point towards an attempt to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 https://infrive.ru/uplcv?utm_term=sabrimala+temple+case+judgement+pdf PDF link annotation
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607215c0092f5---rowopapuzorebedafojisip.pdfIn PDF document text
    • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9a91aa601---36040204164.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/98583284885.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/a32da2b9f5611bc6bbc38b36f827549b/52122267126.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082c35e23e5e---xawumunazokonukaximegota.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f088a8650a---pipifatilimoxuxadurezazar.pdfIn PDF document text
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/p7ilhf1mtspp66ijucm7i62jkk/69792590873.pdfIn PDF document text
    • http://findmealocalpainter.com/insurazon/admin/userfiles/file/lateraxilogi.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/u6rramef1p2fot4vfkt19cl2rs/jagazuz.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/160841afe91e2f---83182217534.pdfIn PDF document text
    • http://cunningham-reunion.com/clients/7/73/7399477c88ef979e1ad3ac38e42cffcc/File/90014645306.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b09a87296e5---kajozufoluvidu.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160944e164c20c---vugotodesujenimisik.pdfIn PDF document text
    • http://longarmquiltacademy.com/fckeditor/userfiles/file/86982041224.pdfIn PDF document text
    • https://pima-alarms.net/slicice/file/tigezira.pdfIn PDF document text
    • https://www.newslaundry.com/2018/09/29/what-justice-malhotras-dissenting-verdict-on-sabarimala-getsIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C1 5796 bytes
SHA-256: a66ed3645719515cc11bbe0ffa9ca101c3e57c95aac0ff62bfe8082d9c82bfa0
font_01_sfnt_off0000f966.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF966 10524 bytes
SHA-256: 0742d52fec7b892d3f53e2cfa85d0060b17af8365dbacd7ab5b737a0b7665119