Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f9e89530129414b…

MALICIOUS

PDF

74.3 KB Created: 2021-02-07 00:31:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 413217a69ccf79594a357a9026219c26 SHA-1: 9f124a6321730038f67e2135e037b2cf4ec8dccc SHA-256: 4f9e89530129414ba1c8f46bc703ae67fbd86ba108a64af011c5044330ef55b0
214 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, with at least one identified as a malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'Scooby doo laugh ringtone'. The presence of multiple PDF links and a critical heuristic firing for malicious redirector links strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/123?utm_term=scooby+doo+laugh+ringtone In PDF document text
    • http://rrrrkkkkk.space/wedukogatalarasebanip1o1k3.pdfIn PDF document text
    • https://nozoporunetub.weebly.com/uploads/1/3/0/8/130814805/7128556.pdfIn PDF document text
    • http://nudistoff.club/business_management_chapter_17_quizletekbal.pdfIn PDF document text
    • https://bepefuligifeval.weebly.com/uploads/1/3/5/9/135981888/743e0cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422136/normal_60109b185148a.pdfIn PDF document text
    • https://nilowebun.weebly.com/uploads/1/3/4/7/134751503/modokenaseni_kipusibati_lawipemagaxig_mewuravukozepo.pdfIn PDF document text
    • https://jaluburevajag.weebly.com/uploads/1/3/0/8/130874017/6bd4e05958.pdfIn PDF document text
    • https://jevezorubik.weebly.com/uploads/1/3/4/8/134864628/599cb2e52771.pdfIn PDF document text
    • http://lnstagaram-verifiedbadges-from.com/plan_anual_de_trabajo_de_educacion_primaria_primer_gradoa7rvo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408582/normal_60009733e0d67.pdfIn PDF document text
    • http://crysety.xyz/7368982080q3nuq.pdfIn PDF document text
    • http://usblighter24.site/king_s_raid_gau_guidebpcax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393204/normal_5fdbd76821127.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401515/normal_5fda2ae5d4925.pdfIn PDF document text
    • http://matrixbicycles.com/29105134517lnv46.pdfIn PDF document text
    • https://wixotavu.weebly.com/uploads/1/3/4/7/134764887/d1f0befae8bbb21.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tesapibebujep/crystal_reports_redistributable_for_windows_server_2012.pdfIn PDF document text
    • https://s3.amazonaws.com/bibejovixapis/anemia_de_celulas_falciformes_y_paludismo.pdfIn PDF document text
    • https://s3.amazonaws.com/tojazudibumogab/39427263315.pdfIn PDF document text
    • https://s3.amazonaws.com/tidigudetefumof/76266312822.pdfIn PDF document text
    • https://s3.amazonaws.com/dewutexorob/47108031595.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
    • 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_off0000c95a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC95A 5368 bytes
SHA-256: 88fefffe71c64d3ceee7767c89f62a8e3b775af582cb463d00e7a463ee4d2b5c
font_01_sfnt_off0000db94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB94 9988 bytes
SHA-256: 729ffbf7fc8ee68133d62608115e955940895463ee0ceb4e03ce00e9054ed595
font_02_sfnt_off0000fd45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD45 18328 bytes
SHA-256: 43811fcb4fdf64c240d2b2f63ed09a7262382d5d4e0a4e2e98430b027c07388e

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