Malicious PDF — malware analysis report

Static analysis result for SHA-256 11a471e5b83a59c2…

MALICIOUS

PDF

72.8 KB Created: 2021-02-07 08:53:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: d648906ee0ca752eff972c411b7141db SHA-1: 2b0235a0b96eeddc591efa504b7743f17efd21d9 SHA-256: 11a471e5b83a59c2e6f40399dc9505c148206230e534c0847081dd217c39d61a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9998

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 https://crophysi.ru/aws?utm_term=bamini+tamil+font+keyboard+software+free PDF link annotation
    • https://guxumexowe.weebly.com/uploads/1/3/3/9/133999944/9420046.pdfIn PDF document text
    • https://kisagisetiduke.weebly.com/uploads/1/3/4/7/134762251/3473973.pdfIn PDF document text
    • http://purigoguwoz.22web.org/sezojuwom.pdfIn PDF document text
    • http://vuwomodema.22web.org/77109962890.pdfIn PDF document text
    • http://sexapixir.22web.org/neurological_examination_ppt.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457298/normal_5ff513aad43d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378618/normal_601bcb963c84c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454286/normal_600e51c37eb30.pdfIn PDF document text
    • https://vogapixafaroge.weebly.com/uploads/1/3/4/2/134234717/201c1ddfb9ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456685/normal_6012a2b2a1af7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459180/normal_6003b99c860a1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/fasudikek/vonido.pdfIn PDF document text
    • http://kufelinal.rf.gd/xagivanibat.pdfIn PDF document text
    • http://duxurulokij.epizy.com/afro_beats_2019.pdfIn PDF document text
    • http://gitogopafo.epizy.com/harvard_referencing_guide_neils_toolbox.pdfIn PDF document text
    • http://ninalosuza.rf.gd/lewedenaterofevukuv.pdfIn PDF document text
    • http://govujetimavex.epizy.com/14699113802.pdfIn PDF document text
    • https://s3.amazonaws.com/boxujetanonikuv/24847827606.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000caf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAF4 5500 bytes
SHA-256: 308b4336dc72686fa36407a3e1a3a0b8e1a92cfc75bd4d9b5ebef80202b85ae5
font_01_sfnt_off0000ddab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDAB 5824 bytes
SHA-256: b9716b93c1c1e81f63467020979b78a87d1691707b900f6ad0dbd0ee8dd16021
font_02_sfnt_off0000efdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFDB 11040 bytes
SHA-256: 35510f5c48445dc91aced177e19a36e743d65e77c448d984d767a542ddcc5355

Open this report in the interactive analyzer, or submit your own file for analysis.