Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a6182bfed556889…

MALICIOUS

PDF

108.0 KB Created: 2021-06-24 09:49:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 834c5ae15a11589bd08cd1626698946c SHA-1: 5a79a503e74c6e8dfa7e3dec617ddb0e5324c90c SHA-256: 9a6182bfed556889bc80d0646e26d24eb23df6413c590a6fd0a461679ab08096
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

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://oniceh.ru/uplcv?utm_term=money+mastery+tony+robbins+pdf PDF link annotation
    • https://33mobility.net/uploads/files/9382583911.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070c879d2102---24961753569.pdfIn PDF document text
    • https://wavesmaroochydore.com/wp-content/plugins/super-forms/uploads/php/files/sk31coa0te74jocus59i6itksd/pikometepuvuwapafamewexur.pdfIn PDF document text
    • http://universalestetic.com/userfiles/file/vutojopokemijire.pdfIn PDF document text
    • http://runo34.ru/attachments/file/gaxejumonizupifuwi.pdfIn PDF document text
    • http://bortran.com/upload/image/file/20210622051455.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607051fb710ec---64302267252.pdfIn PDF document text
    • https://www.vbclighting.com/wp-content/plugins/super-forms/uploads/php/files/d0e09815ad8f2d8de3300a60f15741f7/95119696188.pdfIn PDF document text
    • http://artdealer.vn/upload/fckimagesfile/b6acb47e1777b6c92d6c2231a886f234.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608d4e856c978---kenizixopates.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/zevimuwire.pdfIn PDF document text
    • https://unosms.us/userfiles/file/4032914360.pdfIn PDF document text
    • https://marjoyunlar.com/calisma2/files/uploads/30336039806.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609796f2cfd93---53364110851.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ad43f48fbf---sefojemazibujupuwalikuv.pdfIn 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_off00016aed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16AED 5400 bytes
SHA-256: edcb90d738b79af71163ceaf4380bdbcd317158526ed988dc37efb66114efee6
font_01_sfnt_off00017d3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17D3A 11012 bytes
SHA-256: 6dae2293010a0a1221b2961adc80c75b0b27c577a3684f6582a213845bd9fe73

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