Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce2d4da1ab864014…

MALICIOUS

PDF

84.6 KB Created: 2021-09-13 13:55:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 66ebc68b91ca1d01871652053832c4ba SHA-1: 0f678be1d1c1cda73c22d7d3e0b4615a9d67f18b SHA-256: ce2d4da1ab864014f73506f7c5b41acf2f9d95d66ffee6d940651062323d20be
126 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, with one heuristic specifically flagging it as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The document body is heavily obfuscated, preventing a clear understanding of its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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 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 http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/77c97a82734fdd18a30f44edce7272cf/sesobugepuligaze.pdf In PDF document text
    • https://systematix.pl/userfiles/file/xotixekalusewarimez.pdfIn PDF document text
    • https://artofsurfing.com/preview/ckfinder/userfiles/files/gabenapivunozefobital.pdfIn PDF document text
    • http://beloezoloto.ru/userfiles/file/rofovumudomezib.pdfIn PDF document text
    • https://casasholidays.com/scgtest/team-explore/uploads/files/xakuzabumiritotaxasud.pdfIn PDF document text
    • https://cleartunemonitors.com/ckfinder/userfiles/files/66447956696.pdfIn PDF document text
    • https://kurtoglumob.com/upload/file/gubatafenenixer.pdfIn PDF document text
    • http://awfiowv.love-mrt.com/upload/files/sanajolopufujubuwov.pdfIn PDF document text
    • https://marjoyunlar.com/calisma2/files/uploads/zalojojuvonezibibagi.pdfIn PDF document text
    • https://walterchiropracticclinic.com/home/walter/public_html/ckfinder/userfiles/files/jadexafajewevuloturepegaw.pdfIn PDF document text
    • http://intertravel.hu/_user/file/bezevebe.pdfIn PDF document text
    • http://thaisomboonautopart.com/userfiles/files/ramixujuxoxira.pdfIn PDF document text
    • http://teplospectr.ru/images/files/31214865171.pdfIn PDF document text
    • https://manhremhoangvan.com/wp-content/uploads/files/kafolujutawarajij.pdfIn PDF document text
    • http://hotelgiottotorino.com/userfiles/files/tugizidiguliwuba.pdfIn PDF document text
    • https://tramhuonghanoi.vn/upload/files/kezoxotagukebunolakidota.pdfIn PDF document text
    • http://pincailight.com/zk/UploadFile/file/2021090506323973499.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613baec5a5421---77705964350.pdfIn PDF document text
    • http://bioaec.com/userfiles/files/tadox.pdfIn PDF document text
    • http://sbs-group.co/userfiles/files/37853200254.pdfIn PDF document text
    • http://bidmitt.com/img/files/file/jepezesamogexikeselod.pdfIn PDF document text
    • http://dallard.fr/ressource/site-image/files/57200319441.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=lightroom+full+pack+apkPDF 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_off0000de2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE2B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f63d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF63D 20772 bytes
SHA-256: 0eb51c7986c6f2bdf6e25ffc09ee8755a047c0a14013663704c8d67b69b81d74
font_02_sfnt_off00012c38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C38 10672 bytes
SHA-256: 25262c076935239ee0b51bdc0cde3aee19004df5f710ae48c7a7c1c588709175