Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0dea90b419ee3b2…

MALICIOUS

PDF

74.6 KB Created: 2021-09-20 19:50:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-03
MD5: 922e3de5b097852d54f16c96760b665a SHA-1: df17aaa1c7e85e7bf39f8eb90a99a05f80d6701b SHA-256: a0dea90b419ee3b22a3655e0afdda95e9d4cd98cd176fc040b65183788ce3ddb
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a link farm detection and a high-confidence ML classifier. The embedded URLs and the PDF structure suggest an attempt to redirect users to potentially harmful content. The presence of numerous links on disposable or suspicious domains reinforces the phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://tuvanluatdanang.com/upload/ck/files/94951405563.pdf In PDF document text
    • http://benevolo.it/userfiles/files/jarovuvetazo.pdfIn PDF document text
    • http://tsg-edinstvo.ru/userfiles/file/nobenosegudi.pdfIn PDF document text
    • http://bpsstudio.hu/uploads/1962051031.pdfIn PDF document text
    • http://www.anapharmata.hu/ckfinder/core/connector/php/files/18830518126.pdfIn PDF document text
    • http://ottomaniantextile.com/userfiles/file/65904969028.pdfIn PDF document text
    • http://izeninfo.net/admin/upload/files/nefumuweporikatoxa.pdfIn PDF document text
    • http://ciccioinpentola.com/userfiles/files/41570862139.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/161307de4afef9---fotagovoravaroz.pdfIn PDF document text
    • http://namngonviet.com/user-/files/difuwazeb.pdfIn PDF document text
    • http://jungam21.com/upfiles/file/1630701136.pdfIn PDF document text
    • http://rracc.com/file_media/file_image/file/lupop.pdfIn PDF document text
    • http://stellarp.com/userfiles/files/37226789191.pdfIn PDF document text
    • https://maisonforville.be/documents/file/jejidedixa.pdfIn PDF document text
    • http://naturalwonders.com/uploads/files/36460615668.pdfIn PDF document text
    • http://optykglowacki.pl/obrazki/files/55859045523.pdfIn PDF document text
    • http://romangruszecki.com/uploaded/file/galogevukazewasomaxepavo.pdfIn PDF document text
    • https://lean-ds.com/upload/editor/file/nutogukazefedan.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/4a9b71c458eef873c160f06a8ac96fe8/81094201865.pdfIn PDF document text
    • http://investin-khj.ir/ckfinder/userfiles/files/14718729429.pdfIn PDF document text
    • http://kayapaliinsaat.net/file/mojodub.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=attack+on+titan+season+3+part+2+english+dubPDF 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_off0000bf19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF19 11400 bytes
SHA-256: 574b2f189cd4863c64216e1af2ed533bd886ebcf49102ae2d941931a2fdb52ec
font_01_sfnt_off0000d9a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f1b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B4 16720 bytes
SHA-256: d64abb22591cb378ba2d7bb43d41731abfdcf4be2453490cf49d93f7501b8838

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