Malicious PDF — malware analysis report

Static analysis result for SHA-256 323280a23a42b954…

MALICIOUS

PDF

79.1 KB Created: 2021-09-09 02:19:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: e049c6a45d4a22ebd77b5b8046bb184d SHA-1: 964d6c87003a6a759260f3405f321a04cb00032d SHA-256: 323280a23a42b9549634026a5a302b2cdb296d514e4cf7d3a852a9b2dae71415
134 Risk Score

Malware Insights

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

The PDF document was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or redirection mechanism. The heuristic 'SE_URGENCY_LURE' further supports a phishing attempt by indicating the presence of urgency or deadline language within the document's content.

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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://labotinnghia.com/img/files/misogipulevanefat.pdf In PDF document text
    • http://greatnice.club/updatefiles/file/gidevu.pdfIn PDF document text
    • http://kfnmsz.com/upfolder/e/files/20210909025931.pdfIn PDF document text
    • https://toananhmedical.com/uploads/files/nifugitubo.pdfIn PDF document text
    • https://ayurmitra.com/files/file/19289273970.pdfIn PDF document text
    • http://goodtraefarm.com/ckupload/files/saroporuja.pdfIn PDF document text
    • https://xn--psg-9lac.hu/files/files/zizuxibuzateb.pdfIn PDF document text
    • http://puntolinea.org/userfiles/files/folavo.pdfIn PDF document text
    • http://pilanatofishing.com/home/sandbox/domains/shelter.sandbox.tritek.hk/public_html/ckfinder/userfiles/files/furizuximigimifaju.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/be8f43ad2f22a1f50891db2f82d1128c/fajuvowuwot.pdfIn PDF document text
    • https://tjp2-hotlink-j3t.com/contents/files/40826098784.pdfIn PDF document text
    • http://stadtbild-intervention.de/Quansis/ckfinder/userfiles/files/37995693849.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/161335df41e0de---84227395975.pdfIn PDF document text
    • http://reversetheclocknow.com/ckfinder/userfiles/files/93349770300.pdfIn PDF document text
    • http://www.prodomasa.com/ckfinder/userfiles/files/54950561808.pdfIn PDF document text
    • https://anakmeong.com/contents/files/gidokisazikeje.pdfIn PDF document text
    • http://chelseafoodmart.com/uploads/files/tawopuzurepumolojofizirug.pdfIn PDF document text
    • http://archidaldegan.eu/userfiles/files/61350642936.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=hotstar+latest+apk+for+android+tvPDF link annotation
    • https://www.rt9.rspo.org/ckfinder/userfiles/files/dazawaxojutoz.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://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_off0000cfdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFDC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e7f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F3 10640 bytes
SHA-256: 18d22ad651c1e9e2e55cdb825931597387d26598b2de2307a704714bd6fb1b10
font_02_sfnt_off00010062.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10062 17960 bytes
SHA-256: 86ce08c3da49ce3a662fc58b230e011cf603bc0aa00b0ebe366522afcf8b0826

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