Malicious PDF — malware analysis report

Static analysis result for SHA-256 d68f18020029c3eb…

MALICIOUS

PDF

80.5 KB Created: 2021-03-21 04:57:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 63529ebe5b73ea6cafd3e89e1f7ae3d1 SHA-1: b03c8454e89d33889aa722fff90d1659ec59f9c0 SHA-256: d68f18020029c3eb82f82f35647fc48235c7000d975081f1b89e16db80f09b07
186 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://leonvi.ru/123?utm_term=product+promotion+flyer+template+free+psd PDF link annotation
    • https://gamevuwi.weebly.com/uploads/1/3/4/5/134525912/6480695.pdfIn PDF document text
    • https://texifafotolatip.weebly.com/uploads/1/3/4/7/134764930/7606893.pdfIn PDF document text
    • https://gununoneku.weebly.com/uploads/1/3/4/3/134309052/2011478.pdfIn PDF document text
    • http://specrazreshenie.com/romantic_novels_free_download_sinhalawutta.pdfIn PDF document text
    • http://itwomen.space/75624137345hf7fp.pdfIn PDF document text
    • http://losmopaka.site/abrsm_grade_5_violin_exam_piecesik0zw.pdfIn PDF document text
    • http://mimedilubaj.22web.org/61729484864.pdfIn PDF document text
    • https://lemevepavakupe.weebly.com/uploads/1/3/4/7/134701524/5694262.pdfIn PDF document text
    • http://myluckywin.site/engineering_mathematics_by_ka_stroud_7th_editionwefhb.pdfIn PDF document text
    • https://tunugezujemis.weebly.com/uploads/1/3/4/3/134307821/lebomonuzovewi.pdfIn PDF document text
    • http://begokawepene.22web.org/tulifexoregevinapi.pdfIn PDF document text
    • http://skywonder.space/3687871660tmnsz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://78636f1b-f2d6-4e4a-b4e1-07eac4c165d1.filesusr.com/ugd/434c97_efdb38560dc74ff1aefa02e7d9b9a52c.pdf?index=trueIn PDF document text
    • http://gexazavere.epizy.com/vivogulafinapis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e108e866-4fe9-4eef-958c-4d780f270e04/playboi_carti_new_songs_download_mp3.pdfIn PDF document text
    • http://pivekukevojadu.epizy.com/reformas_borbonicas_sociales_y_culturales.pdfIn PDF document text
    • https://413f70bc-0247-4a04-a3fc-eabb14e2b93f.filesusr.com/ugd/f18ee6_aba7fefee1734a70bd3419e3eaf8d200.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbabbe48-2e01-4932-a68a-546674d5fc3a/winners_personalised_prophetic_declaration_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb15b749-16cd-4771-8f14-6fd358d8ea4b/99311379962.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec734503-c33a-4f1a-8403-a7d44784c419/keurig_special_edition_b60_parts.pdfIn PDF document text
    • https://e082b6be-64c0-45f6-a8ff-82b9c6f476f0.filesusr.com/ugd/1479de_18bba13dfc3d41a28ec8c79d0b0686f2.pdf?index=trueIn PDF document text
    • http://nifojasavolu.rf.gd/fomewi.pdfIn PDF document text
    • https://6e229dea-1f83-4be8-8cd3-388eabd4f5e3.filesusr.com/ugd/1cfe37_8999ee93821c419d8dae16a0bdf37d67.pdf?index=trueIn PDF document text
    • https://e3e1c2aa-7f41-47b0-8c2f-d823cb48b857.filesusr.com/ugd/7598fa_565fc90b820b4d1ca0700762ea65a23b.pdf?index=trueIn 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_off0000fc97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC97 5404 bytes
SHA-256: 98df4c11d3296efb0c0783ab75e69bd237c6a740d3ecd6902e266fb8c21a5e6a
font_01_sfnt_off00010eea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EEA 11036 bytes
SHA-256: 37a7831fdb4b1dd091775705246c3ee29409055694ecf2b90042ec72b0b27e37