Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fcc7547ddf1b052…

MALICIOUS

PDF

90.4 KB Created: 2021-04-24 13:57:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f66564fc087ee86b768f687c0150a34f SHA-1: dd7c2ac6c98d95bc7645f6c6e6fc06c137f31ad1 SHA-256: 3fcc7547ddf1b052ee51d254d25d0579dbd3c7c59a15c9062e6bb29635e7e346
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/strik?utm_term=catholic+lay+minister+training PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4389823/normal_60067fa6add12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384164/normal_603b157306f61.pdfIn PDF document text
    • https://zizovotitimojuv.weebly.com/uploads/1/3/2/7/132712514/8062824.pdfIn PDF document text
    • https://xudomulur.weebly.com/uploads/1/3/4/0/134040538/mesavavamoj-kejol-desefumodelamig-soveriki.pdfIn PDF document text
    • http://gofadivus.mygamesonline.org/lumulobifij.pdfIn PDF document text
    • http://katorewudejizut.22web.org/16061624048.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473616/normal_6054e37f44a88.pdfIn PDF document text
    • https://fafidapumexeri.weebly.com/uploads/1/3/1/4/131437561/fumiranelifosa_dadedigokojigo_xudavumuzame.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392462/normal_601b1aff04a67.pdfIn PDF document text
    • https://murunabijijot.weebly.com/uploads/1/3/5/4/135401069/gigiredeparenisita.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447646/normal_600b8dba49bb5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481072/normal_6067e894c26b7.pdfIn PDF document text
    • https://tuwopabawebude.weebly.com/uploads/1/3/1/3/131382790/e1f6cd3c590a4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502906/normal_5fc714e30efe1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bebovufuvuji.myartsonline.com/runa_vimochana_ganesha_stotram_in_telugu_download.pdfIn PDF document text
    • http://vigexosav.myartsonline.com/how_much_does_it_cost_to_get_certified_in_epic.pdfIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/veroxuzepamamapu.pdfIn PDF document text
    • https://s3.amazonaws.com/neporezofov/68420086961.pdfIn PDF document text
    • http://fazatela.myartsonline.com/xebaxabawobabikadesuxe.pdfIn PDF document text
    • http://momugegunimex.rf.gd/rusotuvovanosiwako.pdfIn PDF document text
    • https://s3.amazonaws.com/rikolesafuwofar/gogaxerinijoderagunareku.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000122e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122E5 5220 bytes
SHA-256: c5120fa4a837b16e1edc76ed25a229cae9328977d765f2ad7a5575b838d857a6
font_01_sfnt_off00013482.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13482 11156 bytes
SHA-256: 3f6d0a4ace6f2ea50f45035aff99915a7fd5e6bcf3043aca32084ff822e57ddf

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